Q: A double star system consists of two stars A and B which have time periods TA and TB. Radius RA and RB and mass MA and MB. Choose the correct option.
(a)If TA > TB then RA > RB
(b)If TA > TB then MA > MB
(c)(TA/TB ) = (RA/RB )
(d)TA = TB
Sol: In case of binary star system angular velocity and hence time period of both the stars are equal .