Two plane mirrors are joined at a right angle.A beam of light is shone on one of the mirrors at an angle of incidence of 22 degrees,such that the reflected ray strikes the other mirror.What is the angle of incidence for the beam that strikes the second mirror?
A) 23$^{\circ}$
B) 68$^{\circ}$
C) 43$^{\circ}$
D) 22$^{\circ}$

Question

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The Answer of Two plane mirrors are joined at a right angle.A beam of light is shone on one of the mirrors at an angle of incidence of 22 degrees,such that the reflected ray strikes the other mirror.What is the angle of incidence for the beam that strikes the second mirror?
A) 23$^{\circ}$
B) 68$^{\circ}$
C) 43$^{\circ}$
D) 22$^{\circ}$

Two Plane Mirrors Are Joined at a Right Angle ∘^{\circ}∘ B) 68

Two Plane Mirrors Are Joined at a Right Angle $^{\circ}$ B) 68