Draw a figure describing the following.
The reflecting surface of two mirrors make an angle of 90∘ with each other. If a ray incident of one mirror has an angle of incidents of 30∘, draw the ray reflected from the second mirror. What will be its angle of reflection?
Let r2 be the angle of reflection from the second mirror.
From laws of reflection,
`angle i _1 = angle r_1 = 30° `
Now in `triangle` ABC
θ = 180° - 90° - 60° = 30°
⇒ i2 = 60°
Hence , r2 = 60°
The angle of reflection of incident ray is 60∘.