To understand the formula for power radiated in the form of electromagnetic energy by an object at nonzero temperature. every object at absolute (kelvin) temperature t will radiate electromagnetic waves. this radiation is typically in the infrared for objects at room temperature, with some visible light emitted for objects heated above 1000 k. the formula governing the rate of energy radiation from a surface is given by p=eσat4, where p is the thermal power (also known as the heat current h). part a this formula applies to this formula applies to any object of total surface area a, kelvin temperature t, and emissivity e any object of cross-sectional area a, kelvin temperature t, and emissivity e any object of total surface area a, kelvin temperature t, and emissivity σ any object of cross-sectional area a, kelvin temperature t, and emissivity σ request answer part b
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