A hydrogen atom in the ground state is excited by radiations of wavelength 975 Å.
Find : (a) the energy state to which the atom is excited
(b) how many lines will be possible in emission spectrum

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the Energy of the Photon
We start by calculating the energy of the photon using the formula:
\[ E = \frac{hc}{\lambda} \]
Where:
...