Question

A substance is behaving a convex lens in air and concave lens in water. Then is refractive index is
a)smaller than air
b) greater than both air and water
c) All most equal to water
d) greater than air but less than water​

Answer 1

Answer:

d) greater than air but less than water

Explanation:

If a substance changes its nature in water, then mass of water must be greater than that of the substance.