Sound waves travel at 350 m/s through a warm air and at 3500 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
decreases by a factor 10
increases by a factor 20
increases by a factor 10
decreases by a factor 20
As we know
Effect of frequency on speed of sound -
With change in frequency of sound wave, wavelength also changes so that
- wherein
Thus, the speed of sound is independent of its frequency.
=>
Option 1)
decreases by a factor 10
Incorrect
Option 2)
increases by a factor 20
Incorrect
Option 3)
increases by a factor 10
Correct
Option 4)
decreases by a factor 20
Incorrect