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) become zero (b) become infinite (c) become small, but non-zero (d) remain unchanged

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 (a) become zero (b) become infinite (c) become small, but non-zero (d) remain unchanged
Answer» the FOCAL LENGTH of convex lens 1/f=(u2/u1-1) (1/R1-1/R2)Here u1=u2the focal length =0it will act as PLANE sheet.hope so helpfulnice QUESTION .....,

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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 (a) become zero (b) become infinite (c) become small, but non-zero (d) remain unchanged

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