Consider these four statements about wavefronts. 1. Wavefronts produced by a point source are straight lines. 2. Wavefronts produced by a point source are circular. 3. Wavefronts run parallel to the direction of energy movement. 4. Wavefronts are at right angles to the direction of energy movement. Which two statements are correct?
- A1 and 3
- B1 and 4
- C2 and 3
- D2 and 4