over |
2012-02-14 15:31 |
relative dispersion
前天決定今年好好把 Modern optical engineering 讀完。 Xliw(B'\a4 大概就每天讀個(gè)一節(jié)。有沒(méi)有人要一起讀的? XW*d\vDun Page 7 "gt*k# 1.3 Snell's Law of Refraction )Hqn Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light _J0(GuG=~ as a fraction of the amount that light of a median wavelength is bent. *-s':('R 這一段看不是很懂。有沒(méi)有人可以說(shuō)一下為何要這樣定義?而不直接用 Δn 就好?或是用Δn/Δλ? ($[@'?Z1 Δn/(n - 1) 是不是有什麼物理涵意? muKjeg'b F#|mN0op $~T|v7Y%
|
|