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A star is moving away form the earth wit...

A star is moving away form the earth with a velocvity of 100 km/s. then the shift of its spectral line of wavelength 5700 Å due to Doppler effect will be

A

0.63 Å

B

1.90 Å

C

3.80 Å

D

5.70 Å

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The correct Answer is:
B
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