Question
Physics Question on Wave optics
Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront of the light is:
A
Both spherical and cylindrical
B
Cylindrical
C
Spherical
D
Plane
Answer
Plane
Explanation
Solution
When light emerges out of a convex lens with a source placed at its focus, the rays emerge parallel to the principal axis. This results in a plane wavefront due to the parallel nature of the emergent rays.
