光電工程概論
Homework 2
95 年度第二學期
四技機電三乙
1. Draw the wavefront of the following uniform plane waves:
(a)  ( x, t )  cos(x  t )

(b)  (r , t )  cos(x  y  t )
2.
A light bulb puts out 20W of radiant energy (most of it IR). Assume it to be a
point source and calculate the irradiance of 1.00m away.
3.
Suppose a lightwave that is linearly polarized in the plane-of-incidence impinges
at 30 on a crown-glass (ng = 1.52) plate in air. Compute the appropriate
amplitude reflection and transmission coefficients at the interface.
30
ni = 1
ng = 1.52
4.
請繪圖並且說明為什麼由水面上看水面下的物體，感覺的深度會比實際深度
淺？
5. (P4.58) A glass block having an index of 1.55 is covered with a layer
of water of index 1.33. For light traveling in the glass, what is the
critical angle at the interface ?
water
nt=1.33
ni=1.55
glass
θc