The energy for an electron in H atom is erg

CHEMISTRY · Subjective · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

The energy

E

for an electron in H atom is

-\frac{21.7 \times 10^{-12}}{n^2}

erg. Calculate the energy required to remove electron completely from

n=2

orbit. Also calculate the longest wavelength of light that can be used to cause this transition.