A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom transits form the upper level to the lower level.

Explanation

To find the frequency of radiation emitted when an atom transitions from an upper energy level to a lower energy level, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Energy Difference**:
The energy difference between the two levels is given as \( E_u - E_l = 2.3 \, \text{eV} \).

2. **Convert Electron Volts to Joules**:
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