The electron of H-atom in the ground state is excited to a higher energy level by monuchromatic light of energy `13.22 eV` How many different photon are emitted when it return to the ground state?

Options

A. 4
B. 10
C. 6
D. 15

Explanation

To solve the problem of how many different photons are emitted when an electron in a hydrogen atom returns to the ground state after being excited to a higher energy level by monochromatic light of energy 13.22 eV, we can follow these steps:

### Step 1: Determine the energy levels of the hydrogen atom
The energy of an electron in the nth energy level of a hydrogen atom is given by the formula:
\[ E_n = -\frac{13.6 \, \text{eV}}{n^2} \]
where \( n \) is the principal quantum number.

### Step 2: Calculate the change in energy (ΔE)
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