Question

the converging or diverging power of a lens depend upon the difference of reflective index of lens with respect to the medium in which it is placed. If a converging lens having power P is immersed in a liquid, its focal length 1.will increase 2. will decrease 3. remain unchanged 4.may decrease or may increase​

Answer 1

Answer:

So if you immerse the convex lens in a liquid whose refractive index is greater than refractive index of material of lens then it will change its nature and become concave lens and thus it will start diverging the rays rather than focusing them on a single point.

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