in case of a spherical mirror , f=r/2 what about a lens where to position the focus i have the following notion in mind can you help me understand whether it is right or wrong...

Asked by Priya Rai | 14th Nov, 2010, 03:15: PM

Expert Answer:

First of all you need to review the derivation of obtaining focal length of lense. Its not merely r/2, because it depends on the refractive index of lense material and also the surrounding medium.(But in case of mirror its always r/2).After that post your question clearly.

Answered by  | 14th Nov, 2010, 07:40: PM

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