# A double star system consists of two stars A and B which have time periods TA and TB…

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

Ans: (d)

Sol: In case of binary star system angular velocity and hence time period of both the stars are equal .