<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@vertical+block@b89b69126044487595964ef53c1fafcb" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="5512f402024a11efa4ff0afff417eba9">
<h2 class="hd hd-2 unit-title">Liquid Crystal Displays: An Introduction</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="5512f402024a11efa4ff0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Liquid Crystal Displays: An Introduction</h3>
<div
id="video_6f640427a7644e8ab3183618ad4eff38"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/471242ae47c840aa900e73279570e775.jpeg?Expires=1713970675&Signature=wZSTGPWsFDXGmOahl5bfzFLuyqk%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEEcaCXVzLWVhc3QtMSJIMEYCIQD%2BeoQ1J7iXBoNC%2FJPMx1eE3H6lM9NF6dK7O4i8JKmePAIhAPq1ifVQCzCOTeWEt8hdE3QkxVRGtGPU0w8IPXOjmnSVKsMFCI%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAxoMODU5MjA1NjM3NDExIgxC%2BU2jjRrHxN7ano8qlwWAK%2FbSSc1yaJ5NB1g12f2g9TlxedM4SHq%2Fx1TJsk2i7Vk%2FJVlD1RmRf04nI5%2FhJ1T3yKs1zaSrWDGXxTgIS49JonD1fvozdg6k370heqgj5si8BX%2BWntTUFy0lD%2BR5bU5MZo8lMDnFt28V3SiE8PH1%2BHX8Rq34avJQS9B6kLP9xZ7iTgs%2BHpPmL35OmNzTPi6iVw3JB9Vour3gx7dq3wf9UmksIwEyKHcyjXXpJj2UOsj2%2F%2F7OcMd4xGHJZ2YLeEa%2Fd3NsqAIti3sEyN1ZbPT%2FJJjj8m48KqNQ4kuSfvbh%2FOAuHt6LUyfRNaB729%2BXLRNfJcUV7Zrwn3M0gl14x4iEl6%2Bb7t8TZc62AarBcqQyr0cyLueAHAHB4D7%2FnD%2FzWxarH3Nco5FO%2FxxCIDGP36M1toF3nApFhIAzwqDE9hiCZbwVSD8LW5gkgBOl0dRa6becM3%2B6hmjOtxCNAnoeMdYyXOrwkD1ygaUmL0HtHWLQt5PzBL4qREz%2F8It5lIGM65eY0QA2ejwH69XnEzC8SUNsh%2BxZLRIm2Aue47GcoFAaU0AJT9cdTYhdkAfP9W80uHRFhigRXX0J4ihN%2BDnUb78Y0fqickig7eCjqVIm7vNF%2F0NpiOqviQj2aretimrcNn3bkYXt6YZjlXrC%2FTuiebH3kiAhwhidAcCOYjb%2FCTBcDCip9aDu76iNqGpzNPWgoy2j9Qu5pLrCblsXtpMebpN1dfZqXjasmoBkuKkfBz5IlDqgq1eYLht8NSApRcXqoDrHAbsFJMhdzXrKvmiYJ7cs9uHqz6BTNNbFAo7TOD%2BY01hfwAUhwthkh9kl5P2BAkIsyE1XSI0alEJ3K8mBF8v2gJNg7jdF5l1XlrcSTXWSnWNe%2B4gpoS0wi6WksQY6sAFaBtFRRnjbRUlvkLT6FVwpBRFFpGTUgGe2clPe3w0%2Fj4LO9n6R24dtQ8tDCl8WkZpRy3ID7OW2vKVbKiJ9uD50%2B7R2FpbTnRxAUkAyJXjwJi2A8dA2c3b0r4OC1KCfK7mPIfg4EKj7r4gsuSfNEGq%2ByHCe43Kg3RvxBPlXECK9zKfV18EZMFqH8G6MRJl1qs6Tn9VlaXnxmpZ8iX9KgUXAaY3lqHBWJSUNVBWMFNtPmA%3D%3D&AWSAccessKeyId=ASIA4QDFFSURWRA7TH27", "publishCompletionUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V006000_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V006000_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V006000/MIT315XXT115-V006000.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/transcript/translation/__lang__", "streams": "1.00:oqWFRH40wxg", "completionPercentage": 0.95, "duration": 396.53, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="6f640427a7644e8ab3183618ad4eff38"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_6f640427a7644e8ab3183618ad4eff38">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_6f640427a7644e8ab3183618ad4eff38">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@6f640427a7644e8ab3183618ad4eff38/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@vertical+block@ca56368fa8b04ce3ad61d81c40df150a" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="5512f402024a11efa4ff0afff417eba9">
<h2 class="hd hd-2 unit-title">In-Lecture Question 7.4</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="True" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="5512f402024a11efa4ff0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_3e2d63de0def45b390448b92e95c22c6" class="problems-wrapper" role="group"
aria-labelledby="3e2d63de0def45b390448b92e95c22c6-problem-title"
data-problem-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6" data-url="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="1"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="3e2d63de0def45b390448b92e95c22c6-problem-title" aria-describedby="block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6-problem-progress" tabindex="-1">
In-Lecture Question 7.4
</h3>
<div class="problem-progress" id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@3e2d63de0def45b390448b92e95c22c6-problem-progress"></div>
<div class="problem">
<div>
<span id="anchor_change_my_id_for_each_one_on_the_page"/>
<script type="text/javascript">
/* The object here is to replace the single line input with a textarea */
(function() {
var elem = $("#anchor_change_my_id_for_each_one_on_the_page")
.closest("div.problem")
.find(":text");
/* There's CSS in the LMS that controls the height, so we have to override here */
var textarea = $('<textarea style="height:150px" rows="20" cols="70"/>');
console.log(elem);
console.log(textarea);
//This is just a way to do an iterator in JS
for (attrib in {'id':null, 'name':null}) {
textarea.attr(attrib, elem.attr(attrib));
}
/* copy over the submitted value */
textarea.val(elem.val())
elem.replaceWith(textarea);
})();
</script>
<p>Give an example of the sort of material that forms a liquid crystal. What determines the response time of the display?</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="inputtype_3e2d63de0def45b390448b92e95c22c6_2_1" class=" capa_inputtype textline">
<div class="unanswered ">
<input type="text" name="input_3e2d63de0def45b390448b92e95c22c6_2_1" id="input_3e2d63de0def45b390448b92e95c22c6_2_1" aria-describedby="status_3e2d63de0def45b390448b92e95c22c6_2_1" value=""/>
<span class="trailing_text" id="trailing_text_3e2d63de0def45b390448b92e95c22c6_2_1"/>
<span class="status unanswered" id="status_3e2d63de0def45b390448b92e95c22c6_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_3e2d63de0def45b390448b92e95c22c6_2_1" class="answer"/>
</div>
</div></div>
<div class="solution-span">
<span id="solution_3e2d63de0def45b390448b92e95c22c6_solution_1"/>
</div></div>
<div class="action">
<input type="hidden" name="problem_id" value="In-Lecture Question 7.4" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_3e2d63de0def45b390448b92e95c22c6" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_3e2d63de0def45b390448b92e95c22c6">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="3e2d63de0def45b390448b92e95c22c6-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="3e2d63de0def45b390448b92e95c22c6-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="3e2d63de0def45b390448b92e95c22c6-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="False">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@vertical+block@46ffe538348a47158ac7dd2aea4ed950" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="5512f402024a11efa4ff0afff417eba9">
<h2 class="hd hd-2 unit-title">Twisted Nematic Display</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="5512f402024a11efa4ff0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Twisted Nematic Display</h3>
<div
id="video_d7f8eab0bd54493eaee748b36c481815"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/1d1fbd20096146c1bd8192231166c1c8.jpeg?Expires=1713970675&Signature=K%2Fz5G8Pa%2BPF49K6%2Fq5hRA5rjP2o%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEEcaCXVzLWVhc3QtMSJIMEYCIQD%2BeoQ1J7iXBoNC%2FJPMx1eE3H6lM9NF6dK7O4i8JKmePAIhAPq1ifVQCzCOTeWEt8hdE3QkxVRGtGPU0w8IPXOjmnSVKsMFCI%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAxoMODU5MjA1NjM3NDExIgxC%2BU2jjRrHxN7ano8qlwWAK%2FbSSc1yaJ5NB1g12f2g9TlxedM4SHq%2Fx1TJsk2i7Vk%2FJVlD1RmRf04nI5%2FhJ1T3yKs1zaSrWDGXxTgIS49JonD1fvozdg6k370heqgj5si8BX%2BWntTUFy0lD%2BR5bU5MZo8lMDnFt28V3SiE8PH1%2BHX8Rq34avJQS9B6kLP9xZ7iTgs%2BHpPmL35OmNzTPi6iVw3JB9Vour3gx7dq3wf9UmksIwEyKHcyjXXpJj2UOsj2%2F%2F7OcMd4xGHJZ2YLeEa%2Fd3NsqAIti3sEyN1ZbPT%2FJJjj8m48KqNQ4kuSfvbh%2FOAuHt6LUyfRNaB729%2BXLRNfJcUV7Zrwn3M0gl14x4iEl6%2Bb7t8TZc62AarBcqQyr0cyLueAHAHB4D7%2FnD%2FzWxarH3Nco5FO%2FxxCIDGP36M1toF3nApFhIAzwqDE9hiCZbwVSD8LW5gkgBOl0dRa6becM3%2B6hmjOtxCNAnoeMdYyXOrwkD1ygaUmL0HtHWLQt5PzBL4qREz%2F8It5lIGM65eY0QA2ejwH69XnEzC8SUNsh%2BxZLRIm2Aue47GcoFAaU0AJT9cdTYhdkAfP9W80uHRFhigRXX0J4ihN%2BDnUb78Y0fqickig7eCjqVIm7vNF%2F0NpiOqviQj2aretimrcNn3bkYXt6YZjlXrC%2FTuiebH3kiAhwhidAcCOYjb%2FCTBcDCip9aDu76iNqGpzNPWgoy2j9Qu5pLrCblsXtpMebpN1dfZqXjasmoBkuKkfBz5IlDqgq1eYLht8NSApRcXqoDrHAbsFJMhdzXrKvmiYJ7cs9uHqz6BTNNbFAo7TOD%2BY01hfwAUhwthkh9kl5P2BAkIsyE1XSI0alEJ3K8mBF8v2gJNg7jdF5l1XlrcSTXWSnWNe%2B4gpoS0wi6WksQY6sAFaBtFRRnjbRUlvkLT6FVwpBRFFpGTUgGe2clPe3w0%2Fj4LO9n6R24dtQ8tDCl8WkZpRy3ID7OW2vKVbKiJ9uD50%2B7R2FpbTnRxAUkAyJXjwJi2A8dA2c3b0r4OC1KCfK7mPIfg4EKj7r4gsuSfNEGq%2ByHCe43Kg3RvxBPlXECK9zKfV18EZMFqH8G6MRJl1qs6Tn9VlaXnxmpZ8iX9KgUXAaY3lqHBWJSUNVBWMFNtPmA%3D%3D&AWSAccessKeyId=ASIA4QDFFSURWRA7TH27", "publishCompletionUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V006100_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V011100_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V011100/MIT315XXT115-V011100.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/transcript/translation/__lang__", "streams": "1.00:d6tLdw46oUg", "completionPercentage": 0.95, "duration": 467.35, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="d7f8eab0bd54493eaee748b36c481815"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_d7f8eab0bd54493eaee748b36c481815">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_d7f8eab0bd54493eaee748b36c481815">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@d7f8eab0bd54493eaee748b36c481815/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@vertical+block@137f4677bb6f46868ef73509b33df74e" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="5512f402024a11efa4ff0afff417eba9">
<h2 class="hd hd-2 unit-title">In-Lecture Question 7.5</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="True" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="5512f402024a11efa4ff0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_07afd76509ac4bacac06c8853a35a3fa" class="problems-wrapper" role="group"
aria-labelledby="07afd76509ac4bacac06c8853a35a3fa-problem-title"
data-problem-id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa" data-url="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="0"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="07afd76509ac4bacac06c8853a35a3fa-problem-title" aria-describedby="block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa-problem-progress" tabindex="-1">
In-Lecture Question 7.5
</h3>
<div class="problem-progress" id="block-v1:MITx+3.15.2x+2T2017+type@problem+block@07afd76509ac4bacac06c8853a35a3fa-problem-progress"></div>
<div class="problem">
<div>
<span id="anchor_change_my_id_for_each_one_on_the_page"/>
<script type="text/javascript">
/* The object here is to replace the single line input with a textarea */
(function() {
var elem = $("#anchor_change_my_id_for_each_one_on_the_page")
.closest("div.problem")
.find(":text");
/* There's CSS in the LMS that controls the height, so we have to override here */
var textarea = $('<textarea style="height:150px" rows="20" cols="70"/>');
console.log(elem);
console.log(textarea);
//This is just a way to do an iterator in JS
for (attrib in {'id':null, 'name':null}) {
textarea.attr(attrib, elem.attr(attrib));
}
/* copy over the submitted value */
textarea.val(elem.val())
elem.replaceWith(textarea);
})();
</script>
<p>Explain briefly how an LCD display works.</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="inputtype_07afd76509ac4bacac06c8853a35a3fa_2_1" class=" capa_inputtype textline">
<div class="unanswered ">
<input type="text" name="input_07afd76509ac4bacac06c8853a35a3fa_2_1" id="input_07afd76509ac4bacac06c8853a35a3fa_2_1" aria-describedby="status_07afd76509ac4bacac06c8853a35a3fa_2_1" value=""/>
<span class="trailing_text" id="trailing_text_07afd76509ac4bacac06c8853a35a3fa_2_1"/>
<span class="status unanswered" id="status_07afd76509ac4bacac06c8853a35a3fa_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_07afd76509ac4bacac06c8853a35a3fa_2_1" class="answer"/>
</div>
</div></div>
<div class="solution-span">
<span id="solution_07afd76509ac4bacac06c8853a35a3fa_solution_1"/>
</div></div>
<div class="action">
<input type="hidden" name="problem_id" value="In-Lecture Question 7.5" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_07afd76509ac4bacac06c8853a35a3fa" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_07afd76509ac4bacac06c8853a35a3fa">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="07afd76509ac4bacac06c8853a35a3fa-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="07afd76509ac4bacac06c8853a35a3fa-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="07afd76509ac4bacac06c8853a35a3fa-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="False">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@vertical+block@66b5f89eab0d4d10b1ade99edaf01a69" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="5512f402024a11efa4ff0afff417eba9">
<h2 class="hd hd-2 unit-title">Twisted Nematic Display with a Thin Film Transistor & LCD Summary</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77" data-course-id="course-v1:MITx+3.15.2x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="5512f402024a11efa4ff0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Twisted Nematic Display with a Thin Film Transistor & LCD Summary</h3>
<div
id="video_c3e16e3f4da3458fac0b4db9b2b48d77"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/81511fbf01bb4804b8a59ebabceba0a8.jpeg?Expires=1713970675&Signature=8meM9pHX%2BnxVfvzRA4mGqkZRh48%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEEcaCXVzLWVhc3QtMSJIMEYCIQD%2BeoQ1J7iXBoNC%2FJPMx1eE3H6lM9NF6dK7O4i8JKmePAIhAPq1ifVQCzCOTeWEt8hdE3QkxVRGtGPU0w8IPXOjmnSVKsMFCI%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAxoMODU5MjA1NjM3NDExIgxC%2BU2jjRrHxN7ano8qlwWAK%2FbSSc1yaJ5NB1g12f2g9TlxedM4SHq%2Fx1TJsk2i7Vk%2FJVlD1RmRf04nI5%2FhJ1T3yKs1zaSrWDGXxTgIS49JonD1fvozdg6k370heqgj5si8BX%2BWntTUFy0lD%2BR5bU5MZo8lMDnFt28V3SiE8PH1%2BHX8Rq34avJQS9B6kLP9xZ7iTgs%2BHpPmL35OmNzTPi6iVw3JB9Vour3gx7dq3wf9UmksIwEyKHcyjXXpJj2UOsj2%2F%2F7OcMd4xGHJZ2YLeEa%2Fd3NsqAIti3sEyN1ZbPT%2FJJjj8m48KqNQ4kuSfvbh%2FOAuHt6LUyfRNaB729%2BXLRNfJcUV7Zrwn3M0gl14x4iEl6%2Bb7t8TZc62AarBcqQyr0cyLueAHAHB4D7%2FnD%2FzWxarH3Nco5FO%2FxxCIDGP36M1toF3nApFhIAzwqDE9hiCZbwVSD8LW5gkgBOl0dRa6becM3%2B6hmjOtxCNAnoeMdYyXOrwkD1ygaUmL0HtHWLQt5PzBL4qREz%2F8It5lIGM65eY0QA2ejwH69XnEzC8SUNsh%2BxZLRIm2Aue47GcoFAaU0AJT9cdTYhdkAfP9W80uHRFhigRXX0J4ihN%2BDnUb78Y0fqickig7eCjqVIm7vNF%2F0NpiOqviQj2aretimrcNn3bkYXt6YZjlXrC%2FTuiebH3kiAhwhidAcCOYjb%2FCTBcDCip9aDu76iNqGpzNPWgoy2j9Qu5pLrCblsXtpMebpN1dfZqXjasmoBkuKkfBz5IlDqgq1eYLht8NSApRcXqoDrHAbsFJMhdzXrKvmiYJ7cs9uHqz6BTNNbFAo7TOD%2BY01hfwAUhwthkh9kl5P2BAkIsyE1XSI0alEJ3K8mBF8v2gJNg7jdF5l1XlrcSTXWSnWNe%2B4gpoS0wi6WksQY6sAFaBtFRRnjbRUlvkLT6FVwpBRFFpGTUgGe2clPe3w0%2Fj4LO9n6R24dtQ8tDCl8WkZpRy3ID7OW2vKVbKiJ9uD50%2B7R2FpbTnRxAUkAyJXjwJi2A8dA2c3b0r4OC1KCfK7mPIfg4EKj7r4gsuSfNEGq%2ByHCe43Kg3RvxBPlXECK9zKfV18EZMFqH8G6MRJl1qs6Tn9VlaXnxmpZ8iX9KgUXAaY3lqHBWJSUNVBWMFNtPmA%3D%3D&AWSAccessKeyId=ASIA4QDFFSURWRA7TH27", "publishCompletionUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V006200_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V006200_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V006200/MIT315XXT115-V006200.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/transcript/translation/__lang__", "streams": "1.00:ZlLmICqhNfY", "completionPercentage": 0.95, "duration": 430.47, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="c3e16e3f4da3458fac0b4db9b2b48d77"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_c3e16e3f4da3458fac0b4db9b2b48d77">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_c3e16e3f4da3458fac0b4db9b2b48d77">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+3.15.2x+2T2017/xblock/block-v1:MITx+3.15.2x+2T2017+type@video+block@c3e16e3f4da3458fac0b4db9b2b48d77/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
© All Rights Reserved