| over |
2012-02-14 15:31 |
relative dispersion
前天決定今年好好把 Modern optical engineering 讀完。 ]{YN{
大概就每天讀個一節。有沒有人要一起讀的？ XjX 2[*l
Page 7 c#=&!FRe
1.3 Snell's Law of Refraction Q"A_bdg5
Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light YM i/uy
as a fraction of the amount that light of a median wavelength is bent. GF&_~48GD
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? >f> V5L%1
Δn/(n - 1) 是不是有什麼物理涵意？ ^>-+@+(
r
y)P&]&"?
aZ$/<|y~:_
|
|
