Question

For a plane surface radius of a curvature approaches to infinity .therefore

Answer 1

Answer:

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Explanation:

A plane mirror may be considered to be a part of an infinitely large spherical surface.

And, an infinitely large spherical surface will have infinite radius.

So, radius of curvature for a plane mirror will be infinite.

I hope it's helpful

Answer 2

Answer:

n1/V-n2/U=0 and n2/U=n1/V