When a parallel beam of monochormatic light suffers refraction while going from a rarer medium into a denser medium, which of the following are correct ?
a) the width of the beam decreases
b) the width of the beam increases
c) the refracted beam makes more angle with the interface
d) the refracted beam makes less angle with the interface

Options

A. a, c true
B. b,d true
C. a,d true
D. b,c true

Answer

D

Explanation

`(W_(i))/(W_(r)) = (cos i)/(cos r), i gt r`