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<h2 class="wp-block-heading"><strong>Light energy</strong></h2>



<h3 class="wp-block-heading"><img decoding="async" src="https://www.turito.com/learn-internal/wp-content/uploads/2022/09/image-165.png" alt="" style="width: 60px">&nbsp;Key Concepts</h3>



<ul class="wp-block-list">
<li>What is light energy?</li>



<li>Sources of light</li>



<li>Mediums of propagation of light</li>



<li><a href="https://www.turito.com/learn/physics/shadows" data-type="link" data-id="https://www.turito.com/learn/physics/shadows">Formation of shadows</a></li>
</ul>



<h3 class="wp-block-heading">&nbsp;</h3>



<h3 class="wp-block-heading"><img loading="lazy" decoding="async" width="65" height="60" src="https://www.turito.com/learn-internal/wp-content/uploads/2022/08/Screenshot-2130.png" alt="biosphere">Explanation</h3>



<h3 class="wp-block-heading"><strong>Definition:</strong>&nbsp;</h3>



<p>Light is a form of energy that travels in a straight line. Light is a mechanical wave and can travel through a vacuum. </p>



<h4 class="wp-block-heading"><strong>Important points of light energy:</strong>&nbsp;</h4>



<ol class="wp-block-list">
<li>Light is the form of energy.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Light can travel through a vacuum.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>Light can travel at the speed of 3 x 10<sup>8 </sup>m/s.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="4">
<li>Light has energy <a href="https://www.turito.com/learn/physics/scattering-of-light-grade-10" data-type="link" data-id="https://www.turito.com/learn/physics/scattering-of-light-grade-10">particles</a> called photons.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="5">
<li>Light is the major component that humans have a vision.&nbsp;</li>
</ol>



<h3 class="wp-block-heading"><strong>Sources of light:</strong>&nbsp;</h3>



<p>There are two sources of light energy:&nbsp;&nbsp;</p>



<ol class="wp-block-list">
<li>Natural sources of light&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Artificial sources of light&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Natural sources of light:</strong>&nbsp;</h4>



<p>The light which exists naturally and is not artificial is called the natural source of light. The natural sources of light are:&nbsp;</p>



<ol class="wp-block-list">
<li>Sun&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Stars&nbsp;&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>Thunder&nbsp;&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Artificial sources of light:</strong>&nbsp;</h4>



<p>The light which is created by man and does not exist naturally is called the artificial source of light. The artificial sources of light are:&nbsp;</p>



<ol class="wp-block-list">
<li>Electric bulb&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Candle&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>LED&nbsp;</li>
</ol>



<h3 class="wp-block-heading"><strong>Mediums of propagation:&nbsp;</strong>&nbsp;</h3>



<p>There are three mediums of propagation of light, they are:&nbsp;&nbsp;</p><div class="fillWidthInMob"><a loading='lazy' class="showAdInAllRes"  data-toggle="modal" data-target=#homeLeadForm data-heading="Get Expert Guidance" href="#"><img class="img-fluid" alt="parallel" src=https://a.storyblok.com/f/128066/1100x230/00b28b4876/11-applying-for-collages_leaderboard-1100x230.jpg /></a></div>



<ol class="wp-block-list">
<li>Transparent medium&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Translucent medium&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>Opaque medium&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Transparent medium:</strong>&nbsp;</h4>



<p>The medium through which light can pass completely is called transparent medium.&nbsp;</p>



<h4 class="wp-block-heading">Examples:&nbsp;</h4>



<ol class="wp-block-list">
<li>Water&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Glass&nbsp;</li>
</ol>



<h3 class="wp-block-heading"><strong>Translucent medium:</strong>&nbsp;</h3>



<p>The medium through which light can pass partially is called transparent medium.&nbsp;</p>



<h4 class="wp-block-heading">Examples:&nbsp;</h4>



<ol class="wp-block-list">
<li>Butter paper&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Soap water&nbsp;</li>
</ol>



<h3 class="wp-block-heading"><strong>Opaque medium:</strong>&nbsp;</h3>



<p>The medium through which light cannot pass is called transparent medium&nbsp;</p>



<h4 class="wp-block-heading">Examples:&nbsp;</h4>



<ol class="wp-block-list">
<li>Mirror&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Stone&nbsp;&nbsp;</li>
</ol>



<h3 class="wp-block-heading"><strong>Formation of shadow:</strong>&nbsp;</h3>



<p>Shadows are formed when the opaque medium stops the path of the light ray.&nbsp;</p>



<p>Shadows are dark, and they take the shape of the outmost structure of the opaque object.&nbsp;</p><div class="fillWidthInMob"><a loading='lazy' class="showAdInAllRes"  data-toggle="modal" data-target=#homeLeadForm data-heading="Get Expert Guidance" href="#"><img class="img-fluid" alt="parallel" src=https://a.storyblok.com/f/128066/1100x230/00b28b4876/11-applying-for-collages_leaderboard-1100x230.jpg /></a></div>



<h3 class="wp-block-heading"><strong>Parts of shadows:</strong>&nbsp;</h3>



<h4 class="wp-block-heading"><strong>Umbra:</strong>&nbsp;</h4>



<p>Umbra is the darkest region of the shadow, which is present in the central region of the shadow.&nbsp;</p>



<h4 class="wp-block-heading"><strong>Penumbra:</strong>&nbsp;</h4>



<p>The penumbra is not so much a dark region at the outermost part other than the central region.&nbsp;</p>



<h2 class="wp-block-heading"><strong>Summary:</strong>&nbsp;</h2>



<h3 class="wp-block-heading"><strong>Definition:</strong>&nbsp;</h3>



<p>Light is a form of energy that travels in a straight line. Light is a mechanical wave and can travel through a vacuum.&nbsp;</p>



<h4 class="wp-block-heading"><strong>Important points of light energy:</strong>&nbsp;</h4>



<ol class="wp-block-list">
<li>Light is the form of energy.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Light can travel through the vacuum.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>Light can travel at the speed of 3 x 10<sup>8 </sup>m/s.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="4">
<li>Light has energy particles called photons.&nbsp;</li>
</ol>



<ol class="wp-block-list" start="5">
<li>Light is the major component that humans have the vision.&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Sources of light:</strong>&nbsp;</h4>



<p>There are two sources of light energy:&nbsp;&nbsp;</p>



<ol class="wp-block-list">
<li>Natural sources of light&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Artificial sources of light&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Mediums of propagation:</strong>&nbsp;</h4>



<p>There are three mediums of propagation of light, they are:&nbsp;&nbsp;</p>



<ol class="wp-block-list">
<li>Transparent medium&nbsp;</li>
</ol>



<ol class="wp-block-list" start="2">
<li>Translucent medium&nbsp;</li>
</ol>



<ol class="wp-block-list" start="3">
<li>Opaque medium&nbsp;</li>
</ol>



<h4 class="wp-block-heading"><strong>Parts of Shadows:</strong>&nbsp;</h4>



<h4 class="wp-block-heading"><strong>Umbra:</strong>&nbsp;</h4>



<p>Umbra is the darkest region of the shadow, which is present in the central region of the shadow.&nbsp;</p>



<h4 class="wp-block-heading"><strong>Penumbra:</strong>&nbsp;</h4>



<p>The penumbra is not so much a dark region at the outermost part other than the central region.&nbsp;</p>
