1.

The periodic time of rotation of a certain star is 22 days and its radius is 7 ' 108 metres. If the wavelength of light emitted by its surface be\[4320\,\,{AA}\], the Doppler shift will be (1 day = 86400 sec)                                         [MP PET 2001]

A. \[0.033\,\,{AA}\]
B. \[0.33\,\,{AA}\]
C. \[3.3\,\,{AA}\]                   
D. \[33\,\,{AA}\]
Answer» B. \[0.33\,\,{AA}\]


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