Question

At the interface of two transparent media, at the point of incidence, the incident ray, the refracted ray and the normal all lie in _____.

• A. Different plane
• B. Same plane
• C. Depends on the medium
• D. Insufficient data

Answer 1

The correct option is B

Same plane

The incident ray, the normal at the point of incidence and the refracted ray, all lie in the same plane. This is one of the results of Snell's law i.e. the first law of refraction.