Question

Why does a light ray falls on an object and retraces its path?

Answer 1

hi friend
This happened s because the light travels shortest distance as possible and this is known as refraction according. to Fermat principle

Answer 2

Answer:

$\large{\underline{\underline{\pmb{\sf{AnsweR \:  : -}}}}}$

• For a ray incident normally on a mirror, the ray falls along the normal to mirror. As angle of reflection (r)= angle of incidence =00, therefore, reflected ray goes along the normal. ... Hence, the ray retraces its path.