1.

A spectral line\[\lambda =5000\,\,{AA}\]in the light coming from a distant star is observed as a\[5200\,\,{AA}\]. What will be recession velocity of the star

A.  \[1.15\times {{10}^{7}}cm/\sec \]                                  
B. \[1.15\times {{10}^{7}}m/\sec \]
C. \[1.15\times {{10}^{7}}km/\sec \]                                  
D. 1.15 km/sec
Answer» C. \[1.15\times {{10}^{7}}km/\sec \]                                  


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