The descriptions which are correct for the black bodies include:
Absorptivity is equal to 1
B. Ideal objects which are non-existent in practice
C. The black body has the highest emissive power for a given temperature
D. All the above descriptions are incorrect
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For the fundamental laws of radiation, which of the following descriptions are correct:
A. There is no connection between Stefan-Boltzmann’s Law and Planck’s Law
B. There is no connection between Stefan-Boltzmann’s Law and Lambert’s Law
C. There is no connection between Lambert’s Law and Planck’s Law
D. All the above descriptions are incorrect.
Among the fundamental laws of radiation, which describes the distribution of the radiation energy in terms of the wavelength:
A. Stefan-Boltzmann’s Law
B. Planck’s Law
C. Lambert’s Law
D. Wien’s Law
What is the share of the solar radiation energy in the infrared band (0.76-100 μm) in the total solar radiation energy?
A. 0.2
B. 0.3
C. 0.45
D. 0.5
To enhance the heat transfer, which side is most effective?
A. Heating side
B. Cooling side
C. the side with lower thermal resistance
D. the side with larger thermal resistance
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