If the synodic period of Venus is observed from Earth to be 1.6 years, Venus's sidereal period is ________ years.
A) 1.9
B) 0.45
C) 0.28
D) 1.6
E) 0.62

Question

Quizplus · Accepted Answer

The synodic period (S) and the sidereal period (P) of a planet are related by the formula 1/S = 1/E - 1/P, where E is Earth's sidereal period (1 year). For Venus, 1/1.6 = 1/1 - 1/P, solving for P gives approximately 0.62 years.

If the Synodic Period of Venus Is Observed from Earth