`A` photon of wavelenth `3000` A strikes `a` metal surface, the work function of the metal being `2.20eV`. Calculate `(i)` the energy of the photon in `eV(ii)` the kinetic energy of the emitted photo electron and `(iii)` the velocity of the photo electron.

Explanation

Let's solve the given problem step by step.

### Given Data:
- Wavelength of the photon, \(\lambda = 3000 \, \text{Å} = 3000 \times 10^{-10} \, \text{m}\)
- Work function of the metal, \(\phi = 2.20 \, \text{eV}\)

### Constants:
- Planck's constant, \(h = 6.626 \times 10^{-34} \, \text{Js}\)
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