The image of a star is obtained at F of a concave mirror when the incident ray is

Question

Question

This question was previously asked in

RRB Group D 16 Sept 2022 Shift 3 Official Paper

Answer 1

The correct answer is parallel to principal axis.

Key Points:

There are numerous uses for concave mirrors.
They create upright, magnified images, making them helpful for shaving and doing makeup.
They are also employed in telescopes because they focus light to produce noticeably larger images, as well as spotlights and headlights since they project parallel light beams.
As a result, when the incident ray is parallel to the primary axis, the image of a star can be obtained at F of a concave mirror.

Additional Information:

A concave mirror is a sort of spherical mirror in which the reflecting surface is the inner curved surface of the sphere; hence, the reflecting surface seems to be farther away from the incident light source in this type of mirror.
They are also known as converging mirrors because of how they are made, which causes the incident light to be reflected inward.
They are used to focus light.
At every location along the curved surface of the mirror, both rules of reflection hold true.
By connecting the mirror's curvature's centre to the point of incidence, the normal is drawn along the radius.
Because the normal to the reflecting surface varies at each point on the mirror, the beams' convergence occurs after reflection.