Some images about Physics:<br><p>(from top-left, clockwise)<br></p>
<ol><li>Refraction of light (which is described by <a href="https://en.wikipedia.org/wiki/en:Optics" class="extiw" title="w:en:Optics">w:en:Optics</a>)</li>
<li>A laser</li>
<li>A hot air balloon</li>
<li>A spintop (whose movement is described by <a href="https://en.wikipedia.org/wiki/en:classical_mechanics" class="extiw" title="w:en:classical mechanics">classical mechanics</a>)</li>
<li>The effects of an inelastic collision</li>
<li>Atomic orbitals of hydrogen (which are described by <a href="https://en.wikipedia.org/wiki/en:quantum_mechanics" class="extiw" title="w:en:quantum mechanics">w:en:quantum mechanics</a>)</li>
<li>An atomic bomb exploding</li>
<li>Lightning (which is an electrical phenomenon)</li>
<li>Galaxies (photo made by the Hubble Space Telescope)</li></ol>
<a href="//commons.wikimedia.org/wiki/User:Daniele_Pugliesi" class="mw-redirect" title="User:Daniele Pugliesi">Daniele Pugliesi</a>
<p>Collage created by uploader
</p>
<ul class="gallery mw-gallery-traditional"><li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="//commons.wikimedia.org/wiki/File:Castle_Romeo.jpg" class="image" title="Fastfission, United States Department of Energy, public domain"><img alt="Fastfission, United States Department of Energy, public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Castle_Romeo.jpg/95px-Castle_Romeo.jpg" decoding="async" width="95" height="120" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Castle_Romeo.jpg/143px-Castle_Romeo.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Castle_Romeo.jpg/191px-Castle_Romeo.jpg 2x" data-file-width="1174" data-file-height="1474"></a></div></div>
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<p><a href="//commons.wikimedia.org/w/index.php?title=User:Fastfission&amp;action=edit&amp;redlink=1" class="new" title="User:Fastfission (page does not exist)">Fastfission</a>, United States Department of Energy, public domain
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="//commons.wikimedia.org/wiki/File:HAtomOrbitals2.png" class="image" title="FlorianMarquardt, GFDL"><img alt="FlorianMarquardt, GFDL" src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/HAtomOrbitals2.png/120px-HAtomOrbitals2.png" decoding="async" width="120" height="120" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/HAtomOrbitals2.png/180px-HAtomOrbitals2.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/HAtomOrbitals2.png/240px-HAtomOrbitals2.png 2x" data-file-width="316" data-file-height="316"></a></div></div>
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<p><a href="https://en.wikipedia.org/wiki/en:User:FlorianMarquardt" class="extiw" title="w:en:User:FlorianMarquardt">FlorianMarquardt</a>, GFDL
</p>
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="//commons.wikimedia.org/wiki/File:Hubble_Ultra_Deep_Field_part.jpg" class="image" title="NASA, ESA, S. Beckwith (STScI) and the HUDF Team, public domain"><img alt="NASA, ESA, S. Beckwith (STScI) and the HUDF Team, public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Hubble_Ultra_Deep_Field_part.jpg/120px-Hubble_Ultra_Deep_Field_part.jpg" decoding="async" width="120" height="120" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Hubble_Ultra_Deep_Field_part.jpg/180px-Hubble_Ultra_Deep_Field_part.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Hubble_Ultra_Deep_Field_part.jpg/240px-Hubble_Ultra_Deep_Field_part.jpg 2x" data-file-width="1000" data-file-height="1000"></a></div></div>
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<p>NASA, ESA, S. Beckwith (STScI) and the HUDF Team, public domain
</p>
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:Vernalpro2.jpg" class="image" title="public domain"><img alt="public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Vernalpro2.jpg/120px-Vernalpro2.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Vernalpro2.jpg/180px-Vernalpro2.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Vernalpro2.jpg/240px-Vernalpro2.jpg 2x" data-file-width="3072" data-file-height="2304"></a></div></div>
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<p>public domain
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:28px auto;"><a href="//commons.wikimedia.org/wiki/File:Laser.jpg" class="image" title="NASA, public domain"><img alt="NASA, public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Laser.jpg/120px-Laser.jpg" decoding="async" width="120" height="94" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Laser.jpg/180px-Laser.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Laser.jpg/240px-Laser.jpg 2x" data-file-width="657" data-file-height="512"></a></div></div>
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<p>NASA, public domain
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:Luftballong.jpg" class="image" title="Jon Sullivan (pdphoto.org), public domain"><img alt="Jon Sullivan (pdphoto.org), public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Luftballong.jpg/120px-Luftballong.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Luftballong.jpg/180px-Luftballong.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Luftballong.jpg/240px-Luftballong.jpg 2x" data-file-width="1024" data-file-height="768"></a></div></div>
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<p>Jon Sullivan (<a rel="nofollow" class="external text" href="http://pdphoto.org/">pdphoto.org</a>), public domain
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		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:16px auto;"><a href="//commons.wikimedia.org/wiki/File:Topspun.jpg" class="image" title="Auréola, cc-by-sa-2.0"><img alt="Auréola, cc-by-sa-2.0" src="https://upload.wikimedia.org/wikipedia/commons/thumb/9/94/Topspun.jpg/120px-Topspun.jpg" decoding="async" width="120" height="118" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/9/94/Topspun.jpg/180px-Topspun.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/9/94/Topspun.jpg/240px-Topspun.jpg 2x" data-file-width="1686" data-file-height="1654"></a></div></div>
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<p><a href="//commons.wikimedia.org/wiki/User:Aur%C3%A9ola" title="User:Auréola">Auréola</a>, cc-by-sa-2.0
</p>
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		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:FAE_visualization.jpg" class="image" title="public domain"><img alt="public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/FAE_visualization.jpg/120px-FAE_visualization.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/FAE_visualization.jpg/180px-FAE_visualization.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/FAE_visualization.jpg/240px-FAE_visualization.jpg 2x" data-file-width="700" data-file-height="525"></a></div></div>
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<p>public domain
</p>
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		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:34.5px auto;"><a href="//commons.wikimedia.org/wiki/File:Lightning_NOAA.jpg" class="image" title="National Oceanic and Atmospheric Administration, public domain"><img alt="National Oceanic and Atmospheric Administration, public domain" src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Lightning_NOAA.jpg/120px-Lightning_NOAA.jpg" decoding="async" width="120" height="81" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Lightning_NOAA.jpg/180px-Lightning_NOAA.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Lightning_NOAA.jpg/240px-Lightning_NOAA.jpg 2x" data-file-width="1808" data-file-height="1216"></a></div></div>
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<p>National Oceanic and Atmospheric Administration, public domain
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