A convex lens is dipped in a liquid whose refractive index is equal to the refractive of the lens. Then its focal length willA. Become infiniteB. Become small, but non–zeroC. Remain unchangedD. Become zero

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 of the lens. Then its focal length willA. Become infiniteB. Become small, but non–zeroC. Remain unchangedD. Become zero
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A convex lens is dipped in a liquid whose refractive index is equal to the refractive of the lens. Then its focal length willA. Become infiniteB. Become small, but non–zeroC. Remain unchangedD. Become zero

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