Which of the following descriptions about the characteristics of gas radiation is wrong
A. Radiation and absorption of different types of gases may be quite different
B. Radiation and absorption of gas may have obvious selectivity for wavelength
C. The conclusion of Kirchhoff's law is also applicable to most gas radiation
D. Radiation and absorption of gas takes place in the entire volume
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Two infinite parallel plates with emissivity of 0.3 and 0.5 respectively, the temperature is maintained at 800℃ and 370℃, a heat shelter with an emissivity ε of 0.05 on both sides of the surface is added in the middle. When the radiation reaches equilibrium, the temperature of the heat shield is
A. 551 ℃
B. 651 ℃
C. 751 ℃
D. 851 ℃
Which of the following factors affect the angle coefficient between two surfaces
A. Temperature of both surfaces
B. Emissivity of both surfaces
C. The geometry and relative position of the two surfaces
D. All the above factors have an impact
Knowing the geometric conditions of a curved edge hexahedron, the total number of view factor and the number of independent view factor between each surface are
A. 25, 10
B. 25, 15
C. 36, 10
D. 36, 15
The numeric value of the solar constant is approximately 1370 W/m2, and its physical significance can be described as：
A. The solar radiation energy that is received by a unit area on earth
B. The radiation energy that is emitted from a unit area of the sun
C. The solar radiation energy that is received by a unit area perpendicular to the sun rays at the outer edge of the atmosphere
D. All the above descriptions are incorrect
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