Question

$\huge{ \underline{ \mathsf{QUESTION: }}}$

What is Incident Ray ? ​

Answer 1

Answer:

A ray that strikes the surface separating the two optical media is called the incident ray. ... The incident ray, reflected ray and a line perpendicular to the wall at the contact point lie in the same plane.

Answer 2

$\large\textsf{\textbf{Answer : }}$

A ray that strikes the surface separating the two optical media is called the incident ray.

Your kitchen light being on is incident upon you flipping the switch. And conversely, if you throw a ball onto a surface, that ball is incident upon the surface. You threw it and that led to it hitting the surface. This last usage is the one that is meant by incident ray.