In an atom, the two electrons move round the nucleus in circular orbits of radii R and 4R. The ratio of the time taken by them to complete one revolution is (a) 1/4 (b) 4/1 (c) 8/1 (d) 1/8

 

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In an atom, the two electrons move round the nucleus in

circular orbits of radii R and 4R. The ratio of the time taken

by them to complete one revolution is

(a) 1/4 (b) 4/1 (c) 8/1 (d) 1/8