Why is F=R/2 applicable only to mirrors with small aperture?

Asked by Jaziya | 7th Apr, 2009, 08:38: PM

Expert Answer:

This relation is true for paraxial rays, that is rays that are close to the principal axis.

See if you can understand this derivation because there are some steps that you might find difficult to comprehend as you are in the Xth grade. This derivation is taught in XIIth.

Answered by  | 8th Apr, 2009, 11:05: AM

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