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  3. Assertion:A concave mirror and convex lens both have the same focal length in air. When they are submerged in water, they will have same focal length

. Assertion:A concave mirror and convex lens both have the same focal length in air. When they are submerged in water, they will have same focal length

Reason:The refractive index of water smaller than the refractive index of air.

Best Answer

Ans || (d)

Solution ||| If a mirror is places in amedium other than air, its focal length does not changes as f = R/2. But for the lends

a concave mirror and convex lens

 

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