前天決定今年好好把 Modern optical engineering 讀完。 FjkE^o>
大概就每天讀個一節。有沒有人要一起讀的?
)JeiTh^
Page 7 WXO@oZ!
1.3 Snell's Law of Refraction L_ 8C=MS
Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light n+Fl|4
as a fraction of the amount that light of a median wavelength is bent. o] )qv~o)
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? `S$BBF;
Δn/(n - 1) 是不是有什麼物理涵意? Nl;rg*@o
`lcpUWn
*(D_g!a