Is there any relation between temperature and intensity?
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There is no such thing as temperature of a narrow beam of light falling on a surface.
The notion of temperature is meaningful only for thermodynamic systems in equilibrium. Such a system is characterized by a microscopic distribution of it's constituent particles which doesn't change with time. It is this distribution which corresponds to the observed macroscopic properties such as pressure, temperature etc. In other words,temperature of a system in thermodynamic equilibrium is characterized by a microscopic distribution, and vice versa.
You can of course talk about a closed, evacuated room in contact with a heat bath maintained at constant temperature. The radiation that pervades the room due to this contact is called Black-body radiation
The notion of temperature is meaningful only for thermodynamic systems in equilibrium. Such a system is characterized by a microscopic distribution of it's constituent particles which doesn't change with time. It is this distribution which corresponds to the observed macroscopic properties such as pressure, temperature etc. In other words,temperature of a system in thermodynamic equilibrium is characterized by a microscopic distribution, and vice versa.
You can of course talk about a closed, evacuated room in contact with a heat bath maintained at constant temperature. The radiation that pervades the room due to this contact is called Black-body radiation
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