※ 引述《retryi12 (WOW)》之銘言：
: ※ [本文轉錄自 TransPhys 看板 #1CCf13iz ]
: 作者: retryi12 (WOW) 看板: TransPhys
: 標題: [考古]中興
: 時間: Tue Jul 6 10:09:04 2010
: A grating with 5000 rulings per centimeter is used to produce two
: sets of fringes with λ1=570.720nm and λ2=570.730nm
: (a)What is the highest order in the diffraction pattern of these fringes?
5000 line / cm --> d = 1/5000 cm
By dsinθ= mλ (sinθ=1 --> max)
d 2 * 10^(-5)cm
m < ---- = ---------------- = 3.504 m=3 (highest order)
λ 570.72nm
: (b)For this order,how wide must the grating be so that the two fringes are
: just resolved?
: 謝謝~
λavg 570.725nm
By Releigh Criterion R = ------- = ----------- = 57072.5
λ1-λ2 0.01nm
R=Nm and width = N * d
width = 3.80 cm
這邊有點不太熟 所以就參考用吧 如果有錯 再請大大們指正
我也不太確定 m 到底可不可以到3.5..
恩 大致上是這樣:)
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