Question

With the help of a neatly drawn labelled diagram, prove the law of reflection on the basis of Huygen’s wave theory.

Answer 1

In triangles AOO′ & BOO′

OO′ is common.

AO′= O′B = ct or vt

∠OAO' = ∠OBO' = 90°

Hence, the two triangles are equal/congruent in all respects

∠AOO' = ∠BO'O

∴ (∠i = ∠r ) only accepted if shown correctly in the diagram.