Question

The angle of incidence for a ray of light passing through the centre of curvature of a concave mirror is :
(a) ${45}^{\circ }$ (b) ${90}^{\circ }$ (c) $0^{\circ }$ (d) ${180}^{\circ }$

Answer 1

Answer : (c) $0^{\circ }$

Explanation:

As the ray of light passes through centre of curvature of a concave mirror it strikes the mirror along the normal (i.e. it incidences on to the mirror at 90 degree and 0 degree with normal). Hence the incident ray coincides with the normal.Therefore angle of incidence is 0 degree.