The electron in a given Bohr orbit has a total energy of -1.51 eV.
calculate the wavelength of radiation emitted, when this electron makes a transition of the ground state.

Explanation

To solve the problem of calculating the wavelength of radiation emitted when an electron transitions from the third orbit to the ground state in a hydrogen atom, we will follow these steps:

### Step 1: Identify the initial and final states
The electron is initially in the third orbit (n=3) and transitions to the ground state (n=1).

### Step 2: Calculate the energy levels
Using the formula for the energy of an electron in a Bohr orbit:
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