In a photoelectric experiment, the collector plate is at 2.0 V with respect to the emitter plate made of copper `phi = 4.5`. The emitter is illuminated by a source of monochromatic light of wavelength 200nm. Find the minimum and maximum kinetic energy of the photoelectrons reaching the collector.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the energy of the incident photons
We can find the energy of the photons using the formula:
\[ E = \frac{hc}{\lambda} \]
where:
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