Question

a parallel beam of light after reflection from a mirror converge to a point . the mirror is​

Answer 1

A parallel beam of light after reflection from a mirror converge to a point . The mirror is a CONCAVE MIRROR.

• Concave mirror are a part of spherical mirrors from which they are derived.

• Paraxial rays (parallel rays close to the principal axis) after getting reflected from the mirror converge on a point called the focus.

Reasons why this is not a CONVEX MIRROR?

• In a convex mirror , parallel beams of light after getting reflected diverge away , such that virtual rays meet at the focus behind the mirror.

Image characteristics in CONCAVE MIRROR IN THIS CASE:

• The image is pin-point.

• The image is extensively diminished.

• The image is real.

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