If in Bohr's model, for unielectronic atom, time period of revolution is represented as `T_(n,z)` where `n` represents shell no. and `Z` represents atomic number then the value of `T_(1,2):T_(2,1)` , will be `:`

Options

A. `8:1`
B. `1:8`
C. `1:1`
D. `1:32`

Answer

4

Explanation

`Tprop(n^(3))/(Z^(2)),(T_(1,2))/(T_(2,1))=(1)/(4)xx(1)/(8)=(1)/(32)`