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Assertion(A) : If convex lens is kept in water, its convergent power decreases. Reason(R) : Focal length of lens depends on its refractive index w.r.t. surrounding medium.(a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is NOT the correct explanation of A (c) A is true but R is false (d) A is false and R is also false |
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Answer» Option : (A) Focal length of a lens does depend on the refractive index of lens material w.r.t. the surrounding medium. (a) Both A and R are true and R is the correct explanation of A . Focal length of a lens does depend on the refractive index of lens material w.r.t. the surrounding medium. |
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