Give an outline of the experimental study of the photoelectric effect.

(N/A) The experimental setup for the study of the photoelectric effect consists of an evacuated glass tube containing two metal plates: a photosensitive emitter plate $(C)$ and a collector plate $(A)$.
A quartz window $(W)$ is sealed on the tube, allowing ultraviolet radiation to pass through and irradiate the photosensitive plate $(C)$.
When monochromatic ultraviolet radiation of sufficiently low wavelength is incident on the cathode $(C)$, electrons are emitted from its surface.
These emitted electrons are attracted by the collector plate $(A)$ maintained at a positive potential relative to $C$, resulting in a flow of current known as the photoelectric current.
The potential difference between $A$ and $C$ can be varied using a potential divider arrangement, and its polarity can be reversed using a commutator.
The potential difference is measured by a voltmeter $(V)$, and the resulting photoelectric current, which is typically in the $\mu A$ range, is measured by a microammeter $(\mu A)$.
By changing the photosensitive material of plate $C$, the threshold frequency and work function can be studied.
The intensity and frequency of the incident radiation can be varied to study their effects on the photoelectric current.
Filters or colored glass of different frequencies can be placed in the path of the incident radiation to study the effect of frequency, and the distance between the light source and plate $C$ can be varied to study the effect of intensity.