(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Its not a specific question but a general one to solve similar questions. I need to find focal length of a lens silvered at one face

2. Relevant equations

3. The attempt at a solution

I know a convex lens silvered at one face will behave as an effective concave lens. But i need to find the equations. I can do it by individually solving each case but need a faster one.

My book says that the effective power, P = P(L) + P(M) +P(L).....P(L) is power of lens P(M) is power of mirror. I dont know why this works?

For two lenses kept close i understand why P = P1 + P2 but don't how this works in lens-mirror case too.

Any Help?

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# Homework Help: Lens silvered at one face

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