A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will .........

A convex lens is dipped in a liquid whose refractive index is equal to

1.	A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will .........
Answer» become zero remain unchanged become INFINITE none of these Solution :Focal length in LIQUID, `(1)/(f_1)=(n_g/n_L-1)(1/R_1-1/R_2)` `n_g=n_1` `THEREFORE(1)/(f_L)=(1-1)(1/R_1-1/R_2)` `therefore (1)/(f_L)=0` `thereforef_L`=Infinite

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A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will .........

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