Concept explainers
The effect on observed frequency due to wind.
Answer to Problem 17.11OQ
The rank of the observed frequency from highest to lowest is
Explanation of Solution
Given info: The speeds of the source and observer are
Formula to calculate the observed frequency by observer is,
Here,
For case
The source and observer are stationary. Hence, the speed of the source and observer are
Substitute
Thus, the speed of the observed frequency is equal to the real frequency.
For case
The source is moving toward the stationary observer. Hence, the speed of the source and observe are
Substitute
Assume the observed frequency is
Substitute
For case
The source is moving away from stationary observer. Hence, the speed of the source and observe are
Substitute
Assume the observed frequency is
Substitute
For case
The observer is moving toward the stationary source. Hence, the speed of the observer and source are
Substitute
Assume the observed frequency is
Substitute
For case
The observer is moving away from stationary source. Hence, the speed of the observer and source are
Substitute
Assume the observed frequency is
Substitute
Divide the equation (3) by equation (7).
Thus, observed frequency for case
Divide the equation (5) by equation (9).
Thus, observed frequency for case
The rank of the observed frequency from highest to lowest is,
Conclusion:
Therefore, the rank of the observed frequency from highest to lowest is
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Chapter 17 Solutions
Physics for Scientists and Engineers, Volume 1
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