A ray of light strikes a plane mirror at an angle of incidence i. Determine in terms of i the angle of deviation of the ray after reflection from the mirror.
A
i
B
2i
C
90o-i
D
90o+ i
E
180o - 2i
Verified Correct Answer: E.
Physical Principles & Numerical Solution
the angle of deviation = 180 - the angle of incidence - the angle of reflection
but angle of incidence = angle of reflection(snell's law)
then angle of deviation = 180 - 2i
Source: Myschool Past Questions Archive (Record #24263)