Concept explainers
The three waves below have the same frequency and travel in different media. Rank their speeds from greatest to least,
To rank the speed of three waves with same frequency and different wavelength.
Answer to Problem 22A
The rank of the given wave’s speeds from greatest to least is
(A)
(C)
(B)
Explanation of Solution
Introduction:
The relation between frequency f, wavelength λ and speed of the wave v is
If the frequency is same for different waves, the velocity is directly proportional to the wavelength.
The distance between two consecutive crests or troughs in a wave is the wavelength of that wave. The A has the highest wavelength and hence highest speed
The wave B has the least wavelength and hence least speed.
The wavelength of wave C falls in-between that of A and B. Hence the speed of wave C is in between A and B.
Conclusion:
The rank of the given wave’s speeds from greatest to least is
(A)
(C)
(B)
Chapter 26 Solutions
Conceptual Physics: The High School Physics Program
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