COMEDK2017PhysicsRay Optics

Which mirror is to be used to obtain a parallel beam of light from a small lamp?

Options

APlane mirror
BConvex mirror
CConcave mirror
DAny one of the above

Correct answer

C. Concave mirror

Step-by-step solution

A concave mirror is of converging type as the light parallel to principal axis converges at its focus. So, when a lamp is placed at its focus, the ray of light falling on it becomes parallel beam as shown below.

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