Monochromatic light of wavelength 198 nm is incident on the surface of a metal, whose work function is 2.5 eV. Calculate the stopping potential.

Explanation

To solve the problem of calculating the stopping potential for the given monochromatic light incident on a metal surface, we can follow these steps:

### Step 1: Convert the wavelength from nanometers to meters
Given the wavelength \( \lambda = 198 \, \text{nm} \):
\[ \lambda = 198 \times 10^{-9} \, \text{m} \]

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