Question

What known as paraxial rays

Answer 1

Generally their are two types of Ray's

Paraxial and marginal

Paraxial are those which on reflecting on the mirror converge at the focus.

Marginal Ray's are those which on reflecting on the mirrors converge at a point known as the focal plane.

Answer 2

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Paraxial ray are those which on reflecting on the mirror converge at the focus...

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