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A railway engine whistling at a constant...

A railway engine whistling at a constant frequency moves with a constant speed. It goes past a stationary observer standing beside the railway track. The frequency `(n)` of the sound heard by the observer is plotted agains time `(t)`. Which of the following best represents the resulting curve?

A

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B

C

D

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The correct Answer is:
C
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TARGET PUBLICATION-WAVE MOTION -MCQ 7.1
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  14. A progressive wave is represented by the equation y= 0.5 sin ( 314t- ...

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  18. The equation of a wave is y=A sin (2pint) When it is reflected at a f...

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