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What are factors of thermal radiation?

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in Food Processing Unit Operations by (110k points)
What are factors of thermal radiation?

(a) Time

(b) Temperature

(c) Volume

(d) Pressure

I have been asked this question at a job interview.

The question is from Heat Radiation topic in chapter Heat Transfer Theory of Food Processing Unit Operations

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Best answer
The correct answer is (b) Temperature

Easiest explanation: Temperature plays an important factor in thermal radiation. The heat capacity is defined as the ratio of amount of heat energy supplied and change in temperature. According to Stefan-Boltzmann Law, the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature.

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