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A star is moving away from the earth with a velocity of 100 km/s. If the velocity of light is 3 x 10^8 m/s, then the shift of its spectral

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A star is moving away from the earth with a velocity of 100 km/s. If the velocity of light is 3 x 108 m/s, then the shift of its spectral line of wavelength 5700 Å due to Doppler’s effect will be 

(a) 0.63 Å 

(b) 1.90 Å 

(c) 3.80 Å 

(d) 5.79 Å

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Correct option: (b) 1.90 Å

Explanation:

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