When a mirror is rotated through an angle θ, the reflected ray from it turns through an angle of
θ
θ/2
2è
none of the above
When a plane mirror is rotated by θ, reflected ray turns by 2θ as shown in figure below. This is because the incident ray direction is not changed.
When a plane mirror is rotated through an θ the reflected ray turns through angle 2θ then the angle of deviation is :