Question

What are some examples of photoelectric effect $ ? $

Answer 1

Hint :Before giving some examples of photoelectric effect. First state the photoelectric effect. Also understand the principle of photoelectric effect. Then given some examples of photoelectric effects.

Complete Step By Step Answer:
Photoelectric effect is a phenomenon where electrons (electrically charged particles) from the surface of a metal are emitted by absorbing light (electromagnetic radiation). When a light of sufficient energy is incident on a metal surface, the electrons on the surface of the metals absorb this light and emitted out of the surface of the metal. The photoelectric effect was observed that only certain frequencies of light are able to cause the ejection of electrons.
The light may be infrared, visible, or ultraviolet light, or gamma rays. The material may be a solid, liquid, or gas and the released particles may be ions (electrically charged atoms or molecules) as well as electrons. Applications of the photoelectric effect brought us "electric eye" door openers, light meters used in photography, solar panels and photostatic copying.
Photovoltaic solar energy is generated by converting sunlight into energy, a type of clean, renewable, and inexhaustible energy that can be produced in installations ranging from small panels on the top of houses to large photovoltaic plants. This is achieved using a technology based on the photoelectric effect. When light shines on a cathode plate, the emitted electrons from the plate hit the anode and create a current. A solar panel is created from linking these together.

Note :
Note that the alkali metals have low ionisation enthalpies and therefore, the electrons are easily ejected when exposed to light. Among alkali metals, Caesium (Cesium) is widely and commonly used in photoelectric cells because it can easily convert sunlight into electricity. In photoelectric effect, the kinetic energy of electrons increases with light intensity. However, the kinetic energy was independent of light intensity.