A bat emits short pulses of sound at a frequency of 1.60 ×10^5 Hz . As the bat swoops toward a f

Name: Problem 70, Chapter 11: College Physics Explore and Apply
Uploaded: 2020-10-19T15:10:46-08:00
Duration: 2 min 57 s
Channel: Khoobchandra Agrawal
Description: A bat emits short pulses of sound at a frequency of 1.60 ×10^5 Hz . As the bat swoops toward a flat wall at speed 30 m / s, this sound is reflected from the wall back to the bat. (a) What is the frequency of sound incident on the wall? (b) Consider the wall as a sound source at the frequency calculated in part (a). What frequency of sound does the bat hear coming from the wall?

step 1 Hello friends here it is given a wet emits a short pulse of sound of frequency so if we consider

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A bat emits short pulses of sound at a frequency of $1.60 \times 10^{5} \mathrm{Hz} .$ As the bat swoops toward a flat wall at speed $30 \mathrm{m} / \mathrm{s},$ this sound is reflected from the wall back to the bat. (a) What is the frequency of sound incident on the wall? (b) Consider the wall as a sound source at the frequency calculated in part (a). What frequency of sound does the bat hear coming from the wall?

   A bat emits short pulses of sound at a frequency of $1.60 \times 10^{5} \mathrm{Hz} .$ As the bat swoops toward a flat wall at speed $30 \mathrm{m} / \mathrm{s},$ this sound is reflected from the wall back to the bat. (a) What is the frequency of sound incident on the wall? (b) Consider the wall as a sound source at the frequency calculated in part (a). What frequency of sound does the bat hear coming from the wall?

College Physics Explore and Apply

Eugenia Etkina; Alan… 2nd Edition

Chapter 11, Problem 70

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Solved by Expert Khoobchandra Agrawal

10/19/2020

Step 1

60 \times 10^{5} \mathrm{Hz}$. We are asked to find the frequency of the sound incident on the wall. This is a problem of Doppler effect where the source of sound is moving towards a stationary observer (the wall). The frequency of the sound received by the Show more…

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A bat emits short pulses of sound at a frequency of $1.60 \times 10^{5} \mathrm{Hz} .$ As the bat swoops toward a flat wall at speed $30 \mathrm{m} / \mathrm{s},$ this sound is reflected from the wall back to the bat. (a) What is the frequency of sound incident on the wall? (b) Consider the wall as a sound source at the frequency calculated in part (a). What frequency of sound does the bat hear coming from the wall?

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Key Concepts

Doppler Effect

The Doppler effect is the phenomenon where the observed frequency of a wave changes when there is relative motion between the source of the wave and the observer. When the source and observer move toward each other, the frequency increases; when they recede, the frequency decreases. This concept is key to understanding the alteration of sound frequency in scenarios involving moving sources and/or observers.

Reflection of Sound Waves

Reflection of sound waves involves the bouncing back of sound from a surface. When a wave reflects off a stationary surface, its frequency remains unchanged in the frame of that surface. However, if either the source or the receiver is moving relative to this surface, additional Doppler shifts can occur, making the analysis of reflected sound unique when considering relative motion.

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