The 6563 Å 
line emitted by hydrogen in a star found to be red- shifted by 15 Å. The speed with which the star is be receding from the earth is :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
: Wavelength of 
line 
= 
Red shift observed in star is,
And speed of light, 
Let the velocity of the star with which it is receding away from the earth be v
Red shift relation
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