Q. A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength 980$\mathring A $. The radius of the atom in the excited state, it terms of Bohr radius $a_0$, will be : ($h_c$ = 12500 eV - $\mathring A $)


Energy of photon $ = \frac{12500}{980} = 12.75 eV$
$\therefore$ Electron will excite to n= 4
Since $'R' \propto n^2$
$\therefore$ Radius of atom will be $16a_0$

You must select option to get answer and solution

Questions from JEE Main 2019

Physics Most Viewed Questions

5. The spectrum of an oil flame is an example for ...........

KCET 2010 Dual Nature Of Radiation And Matter