Q. The radius of orbit of a planet is two times that of the earth. The time period of planet is
A) $4.2\ years$
B) $2.8\ years$
C) $5.6\ years$
D) $8.4\ yeasrs$
Explanation
(b) $T_{2} = T_{1}\left( \frac{R_{2}}{R_{1}} \right)^{3/2} = 1 \times (2)^{3/2} = 2.8\ year$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.