1.

A star is moving away from the earth with a velocity of 100 km/s. If the velocity of light is \[3\times {{10}^{8}}m/s\] then the shift of its spectral line of wavelength\[5700\,\,{AA}\]due to Doppler's effect will be                                     [MP PMT 1994]

A. \[0.63\,\,{AA}\]                
B. \[1.90\,\,{AA}\]
C. \[3.80\,\,{AA}\]
D. \[5.70\,\,{AA}\]
Answer» C. \[3.80\,\,{AA}\]


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