…The attenuation constant of absorption in a medium is called the absorption coefficient. For light, if the intensity of the incident light is I 0 , the intensity I of the light when it travels a distance x in the medium is expressed as I = I 0 exp(-α x ) (Lambert's law), and the constant α is called the absorption coefficient. Also, if the wavelength of light in a vacuum is λ, then k , expressed as k = αλ/4π, is called the extinction coefficient. … *Some of the terminology that mentions "Lambert's law" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…媒質中における吸収の減衰定数に吸収係数がある。光については,入射光の強度をI0として,光が媒質中を距離x進行したときの光の強度Iは,I=I0exp(-αx)で表され(ランバートの法則Lambert’s law),定数αを吸収係数と呼んでいる。また真空中の光の波長をλとしたとき,k=αλ/4πで表されるkを消衰係数という。… ※「Lambert's law」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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