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What is doppler's effect?

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What is doppler's effect?

    • Posted by Srivinayak V 7 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 7 years ago

    • Doppler Effect is the shift in frequency of light when there is relative motion between the source and observer.
    • It is used to measure the speed of a receding object.
    • When the source is moving away from the observer then the wavefronts have to travel a greater distance to reach the observer.
    • When a star is moving away from the earth the wavelength in the middle of the visible region of the spectrum moves towards the red end of the spectrum.
    • As a result star looks more reddish when moves away from the earth.

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