In a transition to a state of excitation energy 10.19ev, a …

Physics Atomic and Nuclear Physics Mix MCQ (Single Correct)

In a transition to a state of excitation energy 10.19ev, a hydrogen atom emits a 4890 Å photon. The Binding energy of the initial state is -

1.51 ev

3.4 ev

0.54 ev

0.87 ev

Text Solution

Verified by Experts

The correct answer is:

Energy of emitted photon is

E = = 2.54 ev

The excitation energy is the energy to excite the atom to a level above the ground state. Therefore, the energy level is

E = – 13.6 + 10.19 = – 3.41 eV

Photon arises from transition between energy state such that

E i – E f = h ν = 2.54 eV

E i = 2.54 + E f

E i = 2.54 + (E) = 2.54 – 3.41eV = – 0.87eV

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