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The wavelength of light coming from a distant galaxy is found to be 0.5% more than that coming from a source on earth, then the velocity of galaxy is  _____×107 m/sec

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answer is 0000.15.

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Detailed Solution

As per doppler effect of light Δλλ=VC Given : Δλλ=0.5100=5×10−3 ∴V=Δλλ×C=5×10−3×3×108 ⇒V=15×105 m/sec ⇒V=15100×100×105=15×10−2×107 ⇒V=0.15×107 m/sec
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