Question

A ray of light is incident on a plane mirror and the angle reflection is 30° calculate the angle between the incident ray and reflected ray

Answer 1

hey mate!

angle of incidence =angle of reflection
let the angle between angle of incidence and reflection be x

so, all lie on a single plane thus ,
angle of incidence +x+angle of reflection =180
30+x+30=180
60+x=180
x=180-60
x=120

thus the angle between incident ray and reflected ray is 120 degree


hope it helped!!