Light of wavelenght `5000 Å` fall on a metal surface of work function `1.9 eV` Find
a. The energy of photon

Explanation

To solve the problem of finding the energy of a photon when light of wavelength \(5000 \, \text{Å}\) falls on a metal surface with a work function of \(1.9 \, \text{eV}\), we can follow these steps:

### Step-by-Step Solution:

1. **Convert Wavelength to Meters**:
The given wavelength is \(5000 \, \text{Å}\). We need to convert this to meters.
\[
1 \, \text{Å} = 10^{-10} \, \text{m}
...