Doppler Effect in Sound Waves - 搜索视频

Doppler Effect - Definition, Formula, Examples, Uses, FAQs

Doppler Effect - Definition, Formula, Examples, Uses, FAQs

Doppler effect or Doppler shift is the change in frequency of a wave produced by a moving source with respect to an observer. Doppler effect is useful in a variety of different scientific disciplines, including planetary science.

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For sound waves, the Doppler formula for frequency shift differs slightly between the two situations: (i) source at rest; observer moving, and (ii) source moving; observer at rest. The exact Doppler formulas for the case of light waves in vacuum are, however, strictly identical for these situations. Explain why this should be so. Would you expect the formulas to be strictly identical for the two situations in case of light travelling in a medium?

For sound waves, the Doppler formula for frequency shift differs slightly between the two situations: (i) source at rest; observer moving, and (ii) source moving; observer at rest. The exact Doppler formulas for the case of light waves in vacuum are, however, strictly identical for these situations. Explain why this should be so. Would you expect the formulas to be strictly identical for the two situations in case of light travelling in a medium?

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