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Thermal Radiations: Stefan-Boltzmann law; rate of heat loss

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A spherical "person" of radius 0.67 m has a body temperature of 301.91 K and is in a room surrounded by 12.8-oC walls. If the emissivity of the person's surface is 1, what is the energy loss per second to the nearest tenth of a watt?

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Rate of heat loss to the surrounding is calculated.

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A spherical "person" of radius 0.67 m has a body temperature of 301.91 K and is in a room surrounded by 12.8-oC walls. If the emissivity of the person's surface is 1, what is the energy loss per second to the nearest tenth of a watt?

Answer:

The Stefan's law gives the emissive power of a body due ...

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