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| <div class="post-time-date">2024-05-03</div> | ||
| <h1>質量と計算</h1> | ||
| <p>この作品ではキャラクターの強さ(エネルギー)を<code>質量</code>と表現しています。</p> | ||
| <p>物理学では質量とエネルギーは等価と考えられています。</p> | ||
| <blockquote> | ||
| <p>E = mc^2</p> | ||
| </blockquote> | ||
| <p>ここで、ブラックホールを例に質量や大きさを見ていきたいと思います。</p> | ||
| <iframe width="100%" height="500px" src="https://www.youtube.com/embed/8GnSFAZD8YY?si=HyqpQCHOwf337cLK" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe> | ||
| <h2 id="ブラックホール">ブラックホール</h2> | ||
| <p>ブラックホールの大きさは質量から計算できます。具体的にはシュバルツシルト半径を使います。</p> | ||
| <p>事象の地平線は重力により光すら抜け出せなくなる境界面のこと。これをブラックホールの大きさ(半径)とします。</p> | ||
| <blockquote> | ||
| <p>Rs = 2GM/c^2</p> | ||
| <p>Rs = M/10^27</p> | ||
| </blockquote> | ||
| <p>質量を10^27で割った数字がシュバルツシルト半径です。</p> | ||
| <p>では、宇宙最大のブラックホールである<code>フェニックスA</code>はどれくらいの質量、大きさを持つのでしょうか。</p> | ||
| <p>フェニックスAは太陽の1000億倍の質量を持ち、大きさは1000億kmです。</p> | ||
| <p>太陽自体がとても大きい天体で70万kmです。ブラックホールは基本的にとても小さな天体です。例えば、太陽規模の質量を持つブラックホールだと7kmくらいです。したがって、ブラックホールの大きさが1000億kmというのがどれほど規格外なのかわかります。</p> | ||
| <p><img src="/img/Phoenix_A_compared_to_Ton_618_and_the_Orbit_of_Neptune.jpg" alt=""></p> | ||
| <ul> | ||
| <li>wiki / <a href="https://en.wikipedia.org/wiki/Phoenix_Cluster#/media/File:Phoenix_A_compared_to_Ton_618_and_the_Orbit_of_Neptune.jpg">Faren29</a></li> | ||
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