Question

A plane wave passes through a convex lens. The geometrical shape of the wavefront that emerges is

• A. plane
• B. diverging spherical
• C. converging spherical
• D. none of these

Answer 1

The correct option is C

converging spherical

The explanation for the correct option

Option $\left(C\right)$

1. A convex lens is a converging lens in nature due to its geometry.
2. As the wave passes through the lens, they get converged towards the focus.
3. So , the wave-front will be of the shape of the converging spherical surfaces as the wave is refracted from the lens.

The explanation for the incorrect option

Option $\left(A\right),\left(B\right),\left(D\right)$- The geometrical shape of the wave-front of the convex lens is converging.

Hence, option ($C$) is the correct option.