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		<title>explain xkcd - User contributions [en]</title>
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		<updated>2026-04-29T19:43:45Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3158:_Shielding_Chart&amp;diff=389354</id>
		<title>3158: Shielding Chart</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3158:_Shielding_Chart&amp;diff=389354"/>
				<updated>2025-10-23T05:35:11Z</updated>
		
		<summary type="html">&lt;p&gt;2603:8000:5E00:2913:5E7:584A:5F1D:84C2: /* Explanation */ grey-blue&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3158&lt;br /&gt;
| date      = October 22, 2025&lt;br /&gt;
| title     = Shielding Chart&lt;br /&gt;
| image     = shielding_chart_2x.png&lt;br /&gt;
| imagesize = 740x720px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Sharks can occasionally travel short distances through air when pursuing prey, but their attenuation coefficient is pretty high.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|This page was created by a SPACE-BASED SHARK DEFENSE BOT. Don't remove this notice too soon.}}&lt;br /&gt;
&lt;br /&gt;
This comic is part of a series on [[:Category:Confusion matrices|confusion matrices]].&lt;br /&gt;
&lt;br /&gt;
Various hazardous (or merely obnoxious) materials, objects, and effects can have their danger reduced with specialized protective equipment. The yellow squares are where the shield fails to protect against the object. The grey squares are where the shield is partially successful, but still presents some risk. The greyish-blue squares are where the shield succeeds.&lt;br /&gt;
&lt;br /&gt;
Some hazards, such as {{w|alpha particles}}, a form of radiation with particularly low penetrative power, can be easily deterred by common things; even a relatively short distance through air is enough to minimize their impact. Comparatively, more dangerous hazards, such as the far more penetrative {{w|gamma rays}}, are unaffected by all but the shielding methods actually intended for them.&lt;br /&gt;
&lt;br /&gt;
The title text notes that, while the shark hazard is shown on the chart to be entirely nullified by a sufficient air barrier, in reality sharks are capable of attacking prey even if it is a short distance out of the water.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
[[Category:Sharks]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;/div&gt;</summary>
		<author><name>2603:8000:5E00:2913:5E7:584A:5F1D:84C2</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3158:_Shielding_Chart&amp;diff=389353</id>
		<title>3158: Shielding Chart</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3158:_Shielding_Chart&amp;diff=389353"/>
				<updated>2025-10-23T05:34:21Z</updated>
		
		<summary type="html">&lt;p&gt;2603:8000:5E00:2913:5E7:584A:5F1D:84C2: /* Transcript */ more&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3158&lt;br /&gt;
| date      = October 22, 2025&lt;br /&gt;
| title     = Shielding Chart&lt;br /&gt;
| image     = shielding_chart_2x.png&lt;br /&gt;
| imagesize = 740x720px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Sharks can occasionally travel short distances through air when pursuing prey, but their attenuation coefficient is pretty high.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|This page was created by a SPACE-BASED SHARK DEFENSE BOT. Don't remove this notice too soon.}}&lt;br /&gt;
&lt;br /&gt;
This comic is part of a series on [[:Category:Confusion matrices|confusion matrices]].&lt;br /&gt;
&lt;br /&gt;
Various hazardous (or merely obnoxious) materials, objects, and effects can have their danger reduced with specialized protective equipment. The yellow squares are where the shield fails to protect against the object. The grey-yellow squares are where the shield is partially successful, but still presents some risk. The grey squares are where the shield succeeds.&lt;br /&gt;
&lt;br /&gt;
Some hazards, such as {{w|alpha particles}}, a form of radiation with particularly low penetrative power, can be easily deterred by common things; even a relatively short distance through air is enough to minimize their impact. Comparatively, more dangerous hazards, such as the far more penetrative {{w|gamma rays}}, are unaffected by all but the shielding methods actually intended for them.&lt;br /&gt;
&lt;br /&gt;
The title text notes that, while the shark hazard is shown on the chart to be entirely nullified by a sufficient air barrier, in reality sharks are capable of attacking prey even if it is a short distance out of the water.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
[[Category:Sharks]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;/div&gt;</summary>
		<author><name>2603:8000:5E00:2913:5E7:584A:5F1D:84C2</name></author>	</entry>

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