The distances of two planets from the Sun are 10¹³ m and 10¹² m, respectively. The ratio of their time periods is:
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The distances of two planets from the Sun are 10¹³ m and 10¹² m, respectively. The ratio of their time periods is:

G1 Physics · Accepted Answer

Step 1: By Kepler’s third law, T₁/T₂=(r₁/r₂)³ᐟ². Step 2: Since r₁/r₂=10, the ratio is 10³ᐟ²=10√10. Final answer: C — 10√10.