题目内容

The characteristics that differentiate the radiation heat transfer from the conduction and convection heat transfer include:

A. Strong directionality
B. Occurrence in vacuum
C. Energy transformation and transfer
D. Requirement for temperature difference

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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

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

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