Define (i) Photo–electric effect (ii) Black body radiations.
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Photoelectric effect:
When light hits a metal surface, an electrical potential can be generated. This is known as photoelectric effect. This concept is used to produce electricity from light energy directly. Working of solar panels is based on this concept as a source of power and also used as a light source for our homes.
Blackbody radiation:
The term black body radiation or cavity radiation denotes to an object or body that absorbs all radiation incidents and re-radiates energy which is the only characteristic of this radiation system, not dependent on the type of radiation that occurs.
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Photo–electric effect
The photoelectric effect is the emission of electrons or other free carriers when light shines on a material. Electrons emitted in this manner can be called photo electrons. This phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.
Black body radiations.
An object that absorbs all radiation falling on it, at all wavelengths, is called a black body. When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. Its emission is called black-body radiation.
The photoelectric effect is the emission of electrons or other free carriers when light shines on a material. Electrons emitted in this manner can be called photo electrons. This phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.
Black body radiations.
An object that absorbs all radiation falling on it, at all wavelengths, is called a black body. When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. Its emission is called black-body radiation.
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