Question

A source of sound waves of frequency 1080 moves to the right with a speed of 108 feet per second relative to the ground to its right is a refracting surface moving to the left with a speed of 216 feet per second relative to the ground if the speed of sound is 1080feet per second the wavelength of sound emitting In Air by the source is what

Answer 1

Answer:

Wavelength of sound emitted by the source is 0.9 ft

Explanation:

As we know that wavelength of sound emitted by the source is the ratio of relative speed of sound with respect to source and the frequency of the sound

So here we have

$\lambda = \frac{v - v_s}{f}$

we know that

v = 1080 ft/s

$v_s = 108 ft/s$

f = 1080 Hz

now we have

$\lambda = \frac{1080 - 108}{1080}$

$\lambda = 0.9 ft$

#Learn

Topic : Doppler's Effect

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