When a ray of light is incident normally on an air-glass interface, its angle of refraction is? by Sunday | Aug 28 | Physics WAEC | 0 comments A. 0° B. 42° C. 45° D. 60° E. 90° Correct Answer: Option A – 0° Users Also Read These:A ray of light is incident on mirror m1 and after…A ray of light is incident on a plane mirror at an…A ray of light incident at an angle θ in a…A ray of light is incident on an equilateral…A ray of light travelling from glass into ethyl…