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2012-02-14 15:31 |
relative dispersion
前天決定今年好好把 Modern optical engineering 讀完。 ~b>nCP8q 大概就每天讀個一節。有沒有人要一起讀的? rY[3_ NG% Page 7 p-T~x$"c| 1.3 Snell's Law of Refraction M 5T=Fj86 Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light s]F?=yEp as a fraction of the amount that light of a median wavelength is bent. 5S|}:~7T 這一段看不是很懂。有沒有人可以說一下為何要這樣定義?而不直接用 Δn 就好?或是用Δn/Δλ? u-%r~ } Δn/(n - 1) 是不是有什麼物理涵意? {p#l!P/ c6?c>*z uHUvntr
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