前天決定今年好好把 Modern optical engineering 讀完。 OPpjuIRv
大概就每天讀個一節(jié)。有沒有人要一起讀的？ =1dI>M>tm
Page 7 vUC! fIG
1.3 Snell's Law of Refraction w^K^I_2ge
Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light v"+k~:t*
as a fraction of the amount that light of a median wavelength is bent. ] L2Oz
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? fJjgq) 9
Δn/(n - 1) 是不是有什麼物理涵意？ o/ [
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