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PHY 104 Wave and sound Objective Question
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Question

A sound source is moving away from a stationary observer with speed vₛ. If the source emits sound at frequency f and the speed of sound in the medium is v, what is the observed frequency f', according to the Doppler Effect formulas in the document?
Options
A <i>f' = f * v / (v - vₛ)</i>
B <i>f' = f * v / (v + vₛ)</i>
Correct Answer
C <i>f' = f * (v + vₛ) / v</i>
D <i>f' = f * (v - vₛ) / v</i>
Correct Answer

Option B is the correct answer.

Detailed Explanation

On page 17, under 'Doppler Effect', the section 'For a source moving away from the observer, the observed frequency is decreased' provides the formula f' = f * v / (v + vₛ).

Hint

Refer to the 'Doppler Effect' section on page 17, specifically the formula for a source moving away from a stationary observer.

Question Info

Course: PHY 104
Topic: Wave and sound
Type: Objective
Difficulty: Not specified
Question 337 of 947
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