Question

The diagram above shows three different modes of vibration P, Q and R of the same string:

1. Which vibration will produce a louder sound and why?
2. The sound of which vibration will have maximum shrillness?
3. State the ratio of wavelengths P and R.

Answer 1

1. Vibration Q produces the louder sound because it has the greatest amplitude.
2. Vibration P has maximum shrillness because it has the highest frequency.
3. The wavelength ratio is \[\lambda_P:\lambda_R=1:3\].