engineering recuitment UKPSC AE Civil 2021 Mock Test (Re-Exam) Physics Dual Nature: Photon and Matter Waves The Hydrogen Atom
The ground state energy of hydrogen atom is –13.6 eV. When its electron is in the first excited state, its excitation energy is -
1
10.2 eV
2
zero
3
3.4 eV
4
6.8 eV