Question

The orbital frequency of an electron in the hydrogen atom is proportional to

• A. $n^3$
• B. $n^{-3}$
• C. $n^1$
• D. $n^0$

Answer 1

Answer: (B)

$n^{-3}$

Answer 2

Time period of electron, $T=\frac {4 \varepsilon_0^2n^3h^3}{mZ^2e^4}$
$\therefore T ? n^3$
$\therefore \frac {1}{\text{frequency} \, (f)}? n^3$
or $f ? n^{-3}$