Question

A double star system consists of two stars A and B which have time periods $T_ A$ and $T_B$ . Radius $R_A$ and $R_B$ and mass $M_A$ and $M_B$ . Choose the correct option

• A. if $T_A > T_B$ then $R_A >R_B$
• B. if $T_A > T_B$ then $M_A >M_B$
• C. $\bigg( \frac{T_A}{T_B} \bigg)^2 = \bigg( \frac{R_A}{R_B} \bigg)^3$
• D. $T_A =T_B$

Answer 1

Answer: (D)

$T_A =T_B$

Answer 2

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