前天決定今年好好把 Modern optical engineering 讀完。 D&o\q68W
大概就每天讀個一節。有沒有人要一起讀的? ITqAy1m@C
Page 7 ?a% F3B
1.3 Snell's Law of Refraction 8IxIW0
Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light 0!ZaR6
as a fraction of the amount that light of a median wavelength is bent. I%Yq86
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? [r3sk24
Δn/(n - 1) 是不是有什麼物理涵意? 9*K-d'm
AH/o-$C&
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