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Statement of a problem № 10962

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The drawing shows three situations-A, B, and C-in which an observer and a source of electromagnetic waves are moving along the same line. In each case the source emits a wave that has a frequency of 4.57 × 1014 Hz. The arrows in each situation denote velocity vectors of the observer and source relative to the ground and have the magnitudes indicated (v or 2v), where the speed v is 1.50 × 106 m/s. Calculate the observed frequency in each of the three cases.




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