Question

Define focus and principal focus.

Answer 1

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DEFINE THE FOLLOWING TERMS IN RELATION TO SPHERICAL MIRRORS

PRINCIPAL FOCUS

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★ PRINCIPAL FOCUS ★

IT IS A POINT ON PRINCIPAL AXIS WHERE ALL REFLECTED RAYS ARE EITHER CONVERGE OR DIVERGE

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Answer 2

Answer:

A no of rays parallel to the principal axis are falling on a CONCAVE MIRROR. The reflected rays are all intersecting at a point on the principal axis of the mirror. This point is called the principal focus of a CONCAVE MIRROR.

Explanation:

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