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Temperature and Radiation

Temperature and Radiation

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The properties of blackbody radiation can be described by two laws, one of which is Wien’s Law.

Wien’s displacement basics

Wien’s Law can be simplified by the mathematical equation shown.

Wien’s displacement calculations

A blackbody is one that absorbs all the electromagnetic radiation that comes in contact with it.

Stars as black bodies

Stefan’s Law states that the total energy radiated from a blackbody is proportional to the fourth power of its temperature.

Stefan’s law calculations

In 1964 it was discovered that there was a constant static noise within the universe that had a blackbody spectrum with an equivalent temperature of 3.5 K. This is known as background radiation or CMBR.

Background radiation

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