A sound wave of frequency 660 Hz incidents normally on a perfectly reflecting object. If the speed of sound in air is `330 ms^(-1)`, what is the shortest distance from the wall at which the wave particles have (a) the maximum and (b) the minimum displacement gt

Explanation

(i) Find the frequency and speed of sound in air from the given data.
Do the sound waves after reflection from a wall form stationary or standing waves ?
Find the wavelength of this sound wave
Find when the nodes and antinodes are formed in a stationery wave.
Here, the shortest distance from the wall to Antinode and Node is `lamda//4 and lamda//2`, respectively,
(ii) (a) 12.5 cm (b) zero