Two stars of masses 
and 
distance r apart, revolve about their centre of mass. The period of revolution is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let the distances of the stars with masses 
and 
from their centre of mass be 
and 
respectively so that 
, say. The necessary centripetal force is provided by the gravitational force between them, so that 
.
This gives 
From this one can write the expression for
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