Question
Intensity of sound of public address system is found to be little higher, immediately after rain. Explain.
Solution
After rain, the air becomes humid and hence the density of air decreases.
This results in increase in the velocity of sound in air. Since intensity of sound is directly proportional to the velocity of wave, hence the intensity of wave increases a little after rain.
This results in increase in the velocity of sound in air. Since intensity of sound is directly proportional to the velocity of wave, hence the intensity of wave increases a little after rain.
