Explain stefan's law of thermal radiation. obtain newton's law of cooling from it.
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The Stefan–Boltzmann law describes the power radiated from a black body in terms of its temperature. It states that the total energy radiated per unit surface area of a black body across all wavelengths per unit time.
where, E = -dQ/dt , is rate of Heat radiation per unit area
where, E = -dQ/dt , is rate of Heat radiation per unit area
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Stefan-Boltzmann law, statement that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. The law applies only to blackbodies, theoretical surfaces that absorb all incident heat radiation.
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