`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 these calculations:

### 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:
...