A horizontally propagating laser beam points due east toward an adjustable plane mirror
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics
Problem
A horizontally propagating laser beam points due east toward an adjustable plane mirror. The beam must be redirected so that it travels due north after reflection. What should be the angle between the mirror’s normal and the eastward direction?
(a) 67.5∘
(b) 90∘
(c) 45∘
(d) 22.5∘