1. Explain in a concise and clear! a. Principles of thermal equilibrium! b. Black body phenomenon...

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1. Explain in a concise and clear! a. Principles of thermal equilibrium! b. Black body phenomenon to explain thermal radiation! c. Factors that influence the amount of thermal radiation emitted by objects! d. Application for the use of thermal radiation theory!

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Answer 1

Answer #1

a) A body is said to be in thermal equilibrium when it loses and gains heat at the same rate.

b) A black body is a body that can absorb (and emit) all the thermal radiation incident on it.

c) Thermal radiation depends upon

i) emissivity
ii) surface area
iii) Absolute temperature of the body

d) It is used in designing radiation sheilds.

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Answer 2

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