In Bohr.s model of hydrogen atom, the ratio between the period of revolution of an electron in orbit n=1 to the period of the electron in the orbit n=2 is

Options

A. `1:2`
B. `2:1`
C. `1:4`
D. `1:8`

Answer

D

Explanation

`(T_1)/(T_2) = (n_1^3)/(n_2^3) = (1^3)/(2^3) = 1/8 . Q(T = (2pir)/(V)) ` So `T prop (n^3)/(Z^2)`