Photons of energy 3.55 eV each are incident on a metal surface whose work function is 1.9 eV. What is the maximum K.E with which an electron is ejected form tis surface ?

Explanation

To find the maximum kinetic energy (K.E) of an electron ejected from a metal surface when photons of energy are incident on it, we can use the concept of energy conservation in the photoelectric effect. Here are the steps to solve the problem:

### Step-by-Step Solution:

1. **Identify Given Values:**
- Energy of the photon (E_photon) = 3.55 eV
- Work function of the metal (Φ) = 1.9 eV

...