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Black-body radiation is the thermal electromagnetic radiation within, or surrounding, a body in thermodynamic equilibrium with its environment, emitted by a black body (an idealized opaque, non-reflective body).
Electromagnetic waves emitted by a blackbody are called blackbody radiation. Figure \(\PageIndex{2}\): The intensity of blackbody radiation versus the wavelength of the emitted radiation. Each curve corresponds to a different blackbody temperature, starting with a low temperature (the lowest curve) to a high temperature (the highest curve).
blackbody radiation, energy radiated by any object or system that absorbs all incident radiation. The term usually refers to the spectrum of light emitted by any heated object; common examples include the heating element of a toaster and the filament of a light bulb.
Electromagnetic waves emitted by a blackbody are called blackbody radiation. Figure 6.2 A blackbody is physically realized by a small hole in the wall of a cavity radiator. The intensity I(λ, T) of blackbody radiation depends on the wavelength λ of the emitted radiation and on the temperature T of the blackbody (Figure 6.3).
A black body or blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. The radiation emitted by a black body in thermal equilibrium with its environment is called black-body radiation .
A blackbody is a hypothetical object that absorbs all radiation falling on it and reflects and transmits none. A blackbody is also a perfect emitter of radiation. It emits radiation across all wavelengths – the phenomenon known as blackbody radiation.
It is called blackbody radiation, because an ideal radiator is jet black. It absorbs all radiation incident on it, and thus it can be at thermal equilibrium with the surrounding while emitting more radiation than a white object, which reflects radiation.
Blackbody, in physics, a surface that absorbs all radiant energy falling on it. The term arises because incident visible light will be absorbed, not reflected, and therefore the surface will appear black.
What is a "Blackbody"? In Physics 9B we briefly discussed the idea of a blackbody when we discussed heat transfer by radiation. Now that you have taken Physics 9C, you can understand a little more detail about this concept, and see why it was causing physicists fits right at the turn of the century.
At thermal equilibrium, the rate at which a blackbody absorbs energy is equal to the rate at which it radiates energy. Using the principles of statistical physics, it can be shown that the resulting spectral distribution of the radiation of the blackbody depends only on its temperature T T.