The phenomenon of beats can take place:
1. | for longitudinal waves only. |
2. | for transverse waves only. |
3. | for both longitudinal and transverse waves. |
4. | for sound waves only. |
A tuning fork of frequency 512 Hz is vibrated with a sonometer wire and 6 beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of the string is
1. 506 Hz
2. 512 Hz
3. 518 Hz
4. 524 Hz