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Good absorbers of radiation are also effective emitters.
Thus, a black body, which more readily absorbs infrared radiation also emits it more readily.
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What surface emits heat radiation best?
A matt black surface is best. A theoretical perfect radiator is called a black body.
What is a manufactured device that emits all types of electromagnetic radiation?
It is only theoretically possible to design such a body. This is known as Black Body. Practically speaking Fery's black body is the best one. It is almost ok.
Does black absorb or reflect?
Black absorbs radiation. A perfectly black body would absorb all the radiation that is incident upon it.
Why is Ice a black body?
It's not. The term "black body" is used to describe a hypothetical perfectly black object that reflects no light at all .here the light refers to entire electromagnetic spectrum. Although the emissivity of ice is near about 0.95 hence it behaves more as black body (emmisivity = 1) than a white body. The reason is for ice to be near about black body is that ice is a very good absorber of radiation outside the visible region (eg for infrared rays ) . Hence ice is more a black body than a white body (as in appearance ).
How was light invented?
Light was not invented, but is a naturally occurring phenomenon in nature. Visible light is the result of electromagnetic radiation that has a wavelength in the range of 380 to 740 nanometers. Light is emitted by photons, which have the properties of both waves and particles. In nature, sources of light are most commonly thermal in nature, such as the Sun, which emits black-body radiation.
What surface emits heat radiation best?
A matt black surface is best. A theoretical perfect radiator is called a black body.
What is a perfect black body?
A perfect blackbody absorbs all radiation incident on it and It emits electromagnetic radiation in the form of thermal radiation from its surface. OR A perfect blackbody is a perfect emitter and perfect absorber.
What is a manufactured device that emits all types of electromagnetic radiation?
It is only theoretically possible to design such a body. This is known as Black Body. Practically speaking Fery's black body is the best one. It is almost ok.
What is the relationship between the temperature of a radiating body and the wavelength it emits?
The temperature of the radiating body determines the intensity and characteristics of the radiation it emits. Two electromagnetic radiation principles describe the relationship between a radiating body�s temperature and the radiation it emits. 1. Stefan-Boltzmann�s Law: Hotter objects emit more total energy per unit area than colder objects. 2. Wein�s Displacement Law: The hotter the radiating body, the shorter the wavelength of maximum radiation.
Why are refrigerator compressors painted black?
It's because of radiation that as you know black body is an ideal radiation body for good radiation and so good heat transfer.
Can black holes emit radiation?
Yes it is theorized that black holes constantly emit radiation in the form of thermal energy (Heat) also called Hawking radiation and black-body radiation.
Does black absorb or reflect?
Black absorbs radiation. A perfectly black body would absorb all the radiation that is incident upon it.
Why a person is cold when he wears black at night?
Because black surface emits more light energy than a white surface at night. Therefore, if we use black shirt, it will take more energy from the body, therefore the person will feel colder
Is the color of sun black?
the color of sun is black because when a black body is heated it emits those colors whichwere absorbed by it. so sun emits white light (collection of 7 colors) it means sun is black.....==========================The sun may approximate the Kirchhoff, Planck, and Einstein definitions of a "black body",but that's far from the statement that the sun's color is black.The first answer is inconsistent with itself. It says that a blackbody, when heated,emits those colors which were absorbed by it.-- The statement is logically irrelevant, because it does NOT say that ONLY blackbodies do that.-- It really doesn't matter anyway, because the amount of radiation that the sun absorbs is negligible.Finally, a "blackbody" in thermal equilibrium radiates a broad spectrum whoseamplitude envelope vs. frequency is characteristic of the body's temperature,and as far as the human eye is concerned, its "color" is the color where itsradiation peaks.The sun is certainly not in thermal equilibrium. In the neighborhood of the visiblewavelengths, its radiation spectrum peaks around the yellowish, and that's thecolor of the sun that we perceive.
What is a black body?
A black body is a theoretical body in physics, which absorbs all incident electromagnetic radiation and reflects none.
Is tungsten a black body?
yes, we study black radiation with tunsten bulb.
What color absorbs the most heat?
The answer is black. Black is that colour formed when no colour in the light spectrum is present... A perfect black body takes radiation but does NT emit it back. So generally black clothes are hotter than white ones. And this principle is known as black body radiation.
