Question

Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. The edges of the two mirrors meet at a 30° angle. A light ray that approaches mirror 1 is parallel to mirror 2. The angle of reflection of that ray from mirror 1 is:

Answer 1

Answer:

Angle of refelction is 60°

Explanation:

Let two mirrors XY and ZY  meet at Y such that ∠XYZ = 30°

Let an incident ray PO incident on the 1st mirror XY and is parallel to the 2nd mirror YZ.

Let ON be the normal.

Now we know that , angle of incidence is equal to the angle of reflection

∴∠PON = ∠NOQ =60°

Therefore, the angle of reflection of the ray incident on the 1st mirror is 60 degree.