According to Bohr's theory, the ratio of the times taken by the electron in a hydrogen atom to complete one revolution in orbits corresponding to ground and first excited states is

Options

A. `1:4`
B. `4:1`
C. `1:8`
D. `8:1`

Answer

C

Explanation

`T_(n) prop (n^(3))/(Z^(2))`
`(T_(1))/(T_(2))=((n_(1))/(n_(2)))^(3)=((1)/(2))^(3)=(1)/(8)`