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12 Feb 2012 22:06:10 IST

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doppler effect

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doppler effect

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Viraat Gupta

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13 Feb 2012 09:27:24 IST

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doppler effect is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach, it is identical at the instant of passing by, and it is lower during the recession.

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