Question

if all rays falling on a convex mirror parallel to the principal axis of the mirror what happens to them after reflection from a mirror​

Answer 1

Answer:

the reflection will be irregular according to the rays falling on the convex mirror

Answer 2

Principal Focus

Explanation:

When rays parallel to principal axis fall on convex mirror, they get reflected through the principal focus of mirror.

Let's explain by the diagram

P = principal axis

F = principal focus

C = Curvature

i = angle of incidence

r = angle of reflection

In diagram a ray is parallel to the principal axis (P)  and after reflecting from mirror it pass through point Focal point (F).

In this diagram we can also see that angle of incidence is equal to angle of reflection.