Question

A glass concave lens is placed in a liquid whose optical density is equal to that of the glass. Then the lens .

• A. converges the light
• B. diverges the light
• C. has no effect on the light

Answer 1

The correct option is C has no effect on the light

When the lens has an optical density equal to the medium, there will be no change in the speed of light at any point, so it neither diverges nor converges the light. It lets the light pass through it and has no effect on it.