Related Questions

According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a
A Grey body
B Brilliant white polished body
C Red hot body
D Black body
When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
A Zeroth law of thermodynamics
B First law of thermodynamics
C Second law of thermodynamics
D Kelvin Planck's law
Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
A Aluminium foil
B Refractory bricks
C Iron plate
D Coke breeze
The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law.
A Wavelength of radiation
B Nature of the body
C Temperature of the body
D None of these
As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the
A Temperature of the body only
B Wavelength of monochromatic radiation
C Both A and B
D Nature of material of body
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)
A α = 1; ε ≠ 1
B α ≠ 1, ε = 1
C α ≠ 1, ε ≠ 1
D α = 1; ε = 1
The emissive power of a body depends upon its
A Temperature
B Wave length
C Physical nature
D All of the above
Which one gives the monochromatic emissive power for black body radiation?
A Planck's law
B Kirchhoffs law
C Wien's law
D Stefan-Boltzman law
The value of the wave length for maximum emissive power is given by
A Kirchhoff’s law
B Stefan’s law
C Wine’s law
D Planck’s law
The value of the wavelength for maximum emissive power is given by
A Wien’s law
B Planck's law
C Stefan's law
D Fourier's law

Next steps