Compose a 1250 words assignment on phenomena of the photoelectric effect. Needs to be plagiarism free! Philipp Lenard, Hertz’s assistant, used metal surfaces that had been cleaned and held under vacuum condition to ensure the photoelectric effect is studied on a metal alone but not affected by surface oxidation or contamination. In this experiment, an evacuated glass tube was used to house the metal sample.

The second metal plate was mounted at the other end. The tube was constrained or positioned in a way that light could only shine on the metal plate made out of a photoemissive material. This tube was called a photocell. The photocell was connected to the circuit with a micrometre, voltmeter, and variable power supply. The photoemissive surface was then illuminated with light of different intensities and frequencies. Electrons were knocked free from a photoemissive plate and which gave some slight positive charge. Connecting the second plate to the first plate by wiring the circuit made it positive too. This attracted free-floating photoelectrons via a vacuum where the electrons landed and bounced back to the initial plate that they had started. This experiment did not create photoelectrons out of the light. It instead it used light energy to push electrons that were already around the circuit. This means generating a very small photoelectric current, but the microammeter could measure it. The microammeter could measure the rate at which electrons were ejected from the photoemissive material surface.

The power supply was wired into the circuit with the negative end of the power supply connected to the plate that was not illuminated. This set up the potential difference that could push photoelectrons into the photoemissive metal surface. When power supply was set to a very low voltage, it trapped the electrons with the least&nbsp.energy.