Question

When describing image formation in mirrors, what is the angle of incidence?

Answer 1

'B' is the correct choice.

BUT ... the angle of incidence is not the angle between the light ray
and the mirror.  It's the angle between the light ray and the NORMAL
to the mirror.  The 'normal' is the line that's perpendicular to the mirror.

Answer 2

Answer:

B. The angle the light ray makes as it strikes the surface.

Explanation:

Angle of the incidence is the angle that incident light ray will make with the normal to the surface at which light will strike. The surface is reflecting surface and here it follow the law of reflection

As per law of reflection of light angle of incidence with respect to the normal must be equal to the angle of reflection with normal in other direction.

So we can say that

angle of incidence = angle of reflection

so here we can say that the correct answer would be

B. The angle the light ray makes as it strikes the surface.

so the light ray will reflect at the same angle as that of angle of incidence given in it

so it must be

$\theta_i = \theta_r$