If a0 is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength (λ) of the electron present in the second orbit of hydrogen atom ? [n : any integer]
1
\( \frac{2 a_{0}}{n \pi} \)
2
\(\frac{8 \pi a_{0}}{n} \)
3
\( \frac{4 \pi \mathrm{a}_{0}}{{n}} \)
4
\(\frac{4 n}{\pi a_{0}}\)