Mirrors and Lens

Asked by aruni_maiyer | 22nd May, 2010, 03:54: PM

Expert Answer:

Dear student,

Focal length of any mirror does not depend on medium, so it remains unchanged.Rather, it depends on the material with which it is made.

If the Ref. index of material of lens > water ref. index,then focal length increases

If the Ref. index of material  < water ref. index, focal length decreases

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Answered by  | 22nd May, 2010, 04:24: PM

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