前天決定今年好好把 Modern optical engineering 讀完。 #?S^kM-0
大概就每天讀個一節。有沒有人要一起讀的? }|pwz
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1.3 Snell's Law of Refraction r4SXE\
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Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light I "A_b}~*}
as a fraction of the amount that light of a median wavelength is bent. *+#8mA(
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? Ck)*&
Δn/(n - 1) 是不是有什麼物理涵意? ye,>A.
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