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Thermal Physics

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21 Jan 2012 22:32:04 IST

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newton's law

Physics

hii frnds...............yr pls help me in explaining the concept of emmittance and prefectly black body?

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Sumiran agrawal

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Joined: 20 Jul 2011

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22 Jan 2012 21:03:26 IST

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A black body is a theoretical object that absorbs 100% of the radiation that hits it. Therefore it reflects no radiation and appears perfectly black.

Emittance is a property of a charged particle beam in a particle accelerator. It is a measure for the average spread of particle coordinates in position-and-momentum phase space.

Hope it helps!!!!!!!!!

vidya

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Joined: 31 Jan 2012

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31 Jan 2012 22:39:36 IST

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when a body observes all the energy fallen on it and emits all the energy it has observed then it is called a black body . isnt it cool it never keeps some energy for itself. Emittance is energy emitted by a body per unit area

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