<p><img src="https://imgs.xkcd.com/comics/rayleigh_scattering.png" alt="If you ask &#x22;why are leaves green?&#x22; the usual answer is &#x22;because they&#x27;re full of chlorophyll, and chlorophyll is green,&#x22; even though &#x22;why does chlorophyll scatter green light?&#x22; is a great question too."></p>
<blockquote>
<p>"<a href="https://xkcd.com/1818/">Rayleigh Scattering</a>", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License</p>
</blockquote>
<h2 id="alt-text"><a aria-hidden="true" class="anchor-heading" href="#alt-text"><svg aria-hidden="true" viewBox="0 0 16 16"><use xlink:href="#svg-link"></use></svg></a>Alt Text</h2>
<p>If you ask "why are leaves green?" the usual answer is "because they're full of chlorophyll, and chlorophyll is green," even though "why does chlorophyll scatter green light?" is a great question too.</p>

xkcd

Rayleigh Scattering


# XKCD

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