In an atom two electrons move around the nucleus in circular orbits of radii R and 4R. The ratio of the time taken by them to complete one revolution is

In an atom two electrons move around the nucleus in circular orbits of

1.	In an atom two electrons move around the nucleus in circular orbits of radii R and 4R. The ratio of the time taken by them to complete one revolution is
Answer» `1:4` `4:1` `1:8` `8:7` ANSWER :C