Physics · Oct / Nov 2019 · Paper 12 · Question 23

Here are four statements about wavefronts. 1 Wavefronts from a point source are straight lines. 2 Wavefronts from a point source are circular. 3 Wavefronts are parallel to the direction of energy movement. 4 Wavefronts are perpendicular to the direction of energy movement. Which two statements are correct?

1. A1 and 3
2. B1 and 4
3. C2 and 3
4. D2 and 4

As printed in the paper