A hollow lens is made of thin glass and in the shape of a double conca

1.	A hollow lens is made of thin glass and in the shape of a double concave lens. It can be filled with air, water of refractive index 1.33 or CS2 of refractive index 1.6. It will act as a diverging lens, if it is(a) filled with air and immersed in water(b) filled with water and immersed in CS2(c) filled with air and immersed in CS2(d) filled with CS2 and immersed in water
Answer» Answer is : (d) filled with CS₂ and immersed in water When medium outside a lens is denser than medium of lens, then a concave lens will acts like a convex lens and vice-versa. Now, when hollow lens is filled with CS₂ (η = 1.6) and immersed in water (η = 1.33), its nature remains diverging as refractive index of medium of lens is more than refractive index of surrounding medium.

A hollow lens is made of thin glass and in the shape of a double concave lens. It can be filled with air, water of refractive index 1.33 or CS2 of refractive index 1.6. It will act as a diverging lens, if it is(a) filled with air and immersed in water(b) filled with water and immersed in CS2(c) filled with air and immersed in CS2(d) filled with CS2 and immersed in water

Answer»

Answer is : (d) filled with CS₂ and immersed in water

When medium outside a lens is denser than medium of lens, then a concave lens will acts like a convex lens and vice-versa.

Now, when hollow lens is filled with CS₂ (η = 1.6) and immersed in water (η = 1.33), its nature remains diverging as refractive index of medium of lens is more than refractive index of surrounding medium.

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