Question

please give me the answer....​

Answer 1

Answer:

At Mirror OA,

Angle of incidence = angle of reflection = 30°

∠CAB=30°

∠CAB+∠CBA+∠ACB=180°

30°+90°+∠ABC=180°

∠ABC=60°

At mirror OB,

Angle of incidence = angle of reflection = 60°

Note that,

AC ∣∣ OB

Angle between incident ray and AC = Angle between reflected ray and OB =30°

Hence, first incident ray are last reflected ray in this case are parallel.