A convex lens made of a material of refractive index is placed in a medium having refractive index , then it will behave as
diverging lens
Step 1: Given data
Given data :
The Refractive index of a convex lens in air is
The Refractive index of a medium is
Step 2: Finding the behavior of the lens
The formula of the focal length of the lens in air is
We get the focal length of the lens in the other medium is,
The negative sign shows that the lens is diverging.
Hence, option B) is correct.