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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。 #db8ur3? 大概就每天讀個一節。有沒有人要一起讀的? T4F}MVK Page 7 V#'sH 1.3 Snell's Law of Refraction &Ru|L.G` Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light 50F6jj as a fraction of the amount that light of a median wavelength is bent. D: NBb!
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? 9N:Bu'j&/ Δn/(n - 1) 是不是有什麼物理涵意? &gw. &/t z
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