https://blog.gongquiz.com/2021/09/17/%ed%8c%8c%ec%9e%a5-500nm%ec%9d%98-%ea%b0%80%ec%8b%9c-%eb%b3%b5%ec%82%ac%ec%84%a0%ec%9d%98-%ea%b4%91%ec%9e%90%ec%97%90%eb%84%88%ec%a7%80%eb%8a%94-%ec%95%bd-%eb%aa%87-kj-mol%ec%9d%b8%ea%b0%80/