Question

Match the following:
$\begin{array}{cc}\text{I. Planar Wavefronts}& \text{1. Water surface waves}\\ \text{II. Spherical Wavefronts}& \text{2. Waves in 3D produced by a point source}\\ \text{III. Circular Wavefronts}& \text{3. Waves in 3D produced by a point source infinitely far away}\end{array}$

• A. I-1, II-2, III-3
• B. I-3, II-1, III-2
• C. I-2, II-1, III-3
• D. I-3, II-2, III-1

Answer 1

The correct option is D I-3, II-2, III-1

Circular wavefronts are in 2-D, water surface waves can be an example.
Spherical wavefronts correspond to diverging in case of light, that is a point source.
Planar wavefronts correspond to parallel rays in case of light, that is a point source infinitely far.