A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of 300∘. The number of observable images are
(Formula for number of images is 360θ−1, where θ is the angle between the mirrors.)
The correct option is D 11
Angle of deviation, δ=300∘
We know that, the angle of deviation when the ray is successively reflected by two plane mirrors is given by,
δ=360∘−2θ, where θ is the angle between the mirrors.
30∘ is the angle at which both mirrors are inclined.
As n is even, hence, the number of images,