What type of wavefront will emerge from a (i) distant light source and (ii) point source?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (i) Plane; (ii) Spherical
(i) Distant light source: The wavefronts are approximately plane because the rays arriving at the observer are nearly parallel.
(ii) Point source: The wavefronts are spherical because the light radiates uniformly in all directions from a point.