Two planets orbit the Sun in circular orbits, with their radius of orbit as R_1 = R and R_2 = 4R. Ratio of their periods (T_1/T_2) around the Sun will be

NDA 2020 Physics question

Two planets orbit the Sun in circular orbits, with their radius of orbit as and . Ratio of their periods around the Sun will be

Answer: (B)

By Kepler's third law, , so $ =

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Question ID VK-031669