Q. 29

The time taken by the Mars to revolve round the sun is 1.88 years. Find the ratio of average distance between Mars and the sun to that between the earth and the sun.

Answer :

The period of revolution of mars is and that of earth is . Let the distance between mars and sun be and that between earth and sun be .

Now, from Kepler’s third law, the time period of an orbit is proportional to the cube of the radius of the orbit.

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