What is Photoelectric effect?
Answers
Question:
What is Photoelectric effect ?
Step-by-Step Solution:
Solution:
A phenomenon of a material (metals) which emits electrically charged particles when electromagnetic radiation like light falls on it,so this phenomenon known as photoelectric effect.
More Information:
The Photoelectric effect was discovered by the German physicist Heinrich Rudolf Hertz in 1887.
Question:
What is Photoelectric effect?
Answer:
The photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it. These ejected electrons are called photoelectrons. It is important to note that the emission of photoelectrons and the kinetic energy of the ejected photoelectrons is dependent on the frequency of the light that is incident on the metal’s surface.
The process through which photoelectrons are ejected from the surface of the metal due to the action of light is commonly referred to as photoemission.
The photoelectric effect occurs because the electrons at the surface of the metal tend to absorb energy from the incident light and use it to overcome the attractive forces that bind them to the metallic nuclei.
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||Cases of Photoelectric effect||
- The photoelectric effect does not occur when the red light strikes the metallic surface because the frequency of red light is lower than the threshold frequency of the metal.
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- The photoelectric effect occurs when green light strikes the metallic surface and photoelectrons are emitted.
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- The photoelectric effect also occurs when blue light strikes the metallic surface. However, the kinetic energies of the emitted photoelectrons are much higher for blue light than for green light. This is because blue light has a greater frequency than green light.
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