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The concept involved here is Emissivity - the ability to emit energy. e is the usual symbol, and a perfect emitter would have an e of 1. Your perfect black body will have this emissivity of 1.
A highly polished surface (polished at all the wavelengths concerned) will have an emissivity much smaller. Polished silver has an emissivity of about 0.02.
In general the emissivity of a surface is inversely related to its reflectance, but this does vary with the surface finish, colour, and the mass of the object.
It is worth noting, that low emissivity glass is used with effect in the double glazing of windows.
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Why is radiation of heat larger in a black surface than a white surface?
A black surface absorbs the heat radiation and a white surface reflects the heat radiation
What is tilt factor for beam radiation?
Tilt factor for beam radiation(Rb) is the the ratio of beam radiation on the surface under consideration and the beam radiation on a horizontal surface.
When does the earth emit terrestrial radiation?
Terrestrial radiation refers to heat emitted from the earth's atmosphere and surface.
Do dull silver surfaces emit the same amount of radiation as shiny white surfaces?
Dull silver surfaces and shiny white surfaces can have different emissivity values, which means they might not emit the same amount of thermal radiation. Emissivity is a property that quantifies how effectively an object emits thermal radiation compared to a perfect blackbody at the same temperature. A blackbody has an emissivity of 1, and objects with emissivity closer to 1 are better emitters of thermal radiation. Dull surfaces, including dull silver surfaces, typically have higher emissivity compared to shiny surfaces. Shiny surfaces often have lower emissivity because their smooth and reflective nature reduces their ability to emit thermal radiation effectively. White surfaces can vary in terms of their shininess and emissivity. A shiny white surface might have a lower emissivity, while a more matte or dull white surface may have a higher emissivity. Therefore, if the dull silver surface has a higher emissivity compared to the shiny white surface, it will emit more thermal radiation than the shiny white surface at the same temperature. However, it's important to note that the exact emissivity values can vary based on the specific properties and conditions of the surfaces, so it's best to refer to specific emissivity measurements for accurate comparisons.
What is difference between emitted radiation heat and reflected radiation heat?
The magnitude of the incident angle with the normal of the reflection surface and reflection angle with the normal of the surface are the same. The direction of the reflection is away form the surface and the incident is toward the surface.
What surface emits more radiation white shiny or silver shiny?
silver shiny
Which emits the most infra red radiation matte silver surface or shiny black surface?
Matte (dull) and black surfaces emit infrared radiation at a faster rate than shiny and white surfaces.
Why is radiation of heat larger in a black surface than a white surface?
A black surface absorbs the heat radiation and a white surface reflects the heat radiation
What is tilt factor for beam radiation?
Tilt factor for beam radiation(Rb) is the the ratio of beam radiation on the surface under consideration and the beam radiation on a horizontal surface.
What percent radiation is lost after reaching earth's surface?
about 5% of radiation is lost before reaching Earth's surface
The earths surface transfers heat to the atmosphere primarily by?
the answer is radiation
What happens when radiation reaches earth's surface?
90% of radiation reaching the surface of the earth is absorbed! and 10% is reflected into space.
What form is radiation emitted from the earth's surface back into the atmosphere?
Heat rises from the surface of the earth in the form of infra-red radiation.
What is the term for solar radiation that reaches the earth's surface?
The solar radiation that reaches the earths surface from the sun is called INSOLATION
What type of radiation is trapped on the Earth's surface by the Greenhouse effect?
Infrared Radiation
What happens to most solar radiation when it reaches the surface of Earth what happens?
Most of the solar radiation is absorbed when it reaches the surface of the earth. Some of the solar radiation is also absorbed in the atmosphere.
How radiation affected by surface temperature?
Nuclear radiation is not affected at all, but radiation by Electromagnetic Radiation is. This is a straight Physics topic, not Nuclear Energy.
