Derive a relation between the focal length and radius of curvature of a Plano convex lens made of

glass. Compare the relation with that of a concave mirror. What can you conclude? Justify your

answer

Dear Student!!

Using the lens maker formula,

Focal for concave mirror is,

*f = R/2*

Both converges parallel rays of light coming from infinity parallel to the principle axis at the focus.

For the same radius of curvature focal length of the plano-convex lens is always greater then that of concave mirror.

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