over |
2012-02-14 15:31 |
relative dispersion
前天決定今年好好把 Modern optical engineering 讀完。 *
%M3PTY\ 大概就每天讀個一節。有沒有人要一起讀的? @$c\dvO Page 7 ); dT_ 1.3 Snell's Law of Refraction i Ae<&Ms Relative dispersion is given by Δn/(n - 1) and, in effect, expresses the 「spread」 of the colors of light ;z:UN} as a fraction of the amount that light of a median wavelength is bent. (B_\TdQ 這一段看不是很懂。有沒有人可以說一下為何要這樣定義?而不直接用 Δn 就好?或是用Δn/Δλ? wl$h4 {L7 Δn/(n - 1) 是不是有什麼物理涵意? b7tOo7a H) ? 1$fJ3 z3M6V}s4
|
|