`A` light source of power 16 watts emits light of wavelength `310nm`. If all emitted photons are made to strike a metal plate of work function `1.5eV` then find out the magnetic of photo-current if `50%` of incident photons eject photoelectrons.

Explanation

To solve the problem step by step, we will follow the principles of photon energy, power, and photoelectric effect.

### Step 1: Calculate the energy of a single photon
The energy of a photon can be calculated using the formula:
\[ E = \frac{hc}{\lambda} \]
Where:
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