Question

Why does a ray of light passing through the centre of curvature of a concave mirror after reflection is reflected back along the same path ?​

Answer 1

Answer:

Hey there !

When a Light Ray strikes on the concave mirror through Centre of Curvature, the Ray forms 90° with the reflecting surface.This means that the Ray is the Normal as it is perpendicular.Here,both the Incident Ray and the Normal is same(no angle is formed).So,angle of incidence(angle formed between incident Ray and normal) is 0°.Therefore, Angle of reflection(angle formed between reflected Ray and Normal) is also 0°(according law of reflection).Thus,the reflected Ray goes along the same path,forming 0°.