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CBSE Class 10 Answered

Mirrors and Lens
Asked by aruni_maiyer | 22 May, 2010, 03:54: PM
answered-by-expert 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 | 22 May, 2010, 04:24: PM

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