Frequency of revolution of an electron revolving in `n^(th)` orbit of H-atom is proportional to

Options

A. n independent of n
B. `1/(n^(2))`
C. `1/(n^(3))`
D. n

Answer

C

Explanation

(c) : `T (2pir)/(v)rArr 1/upsilon = (2pir)/v or upsilon=v/(2pir)` So, for H-like atom , `v prop 1/n` and r `prop n^(2)`
`rArr upsilon prop 1/(n^(2)xx n) rArr upsilon prop 1/(n^(3))`