A perfect black body is one which

Related MCQs

• A perfect black body is a perfect __________ of radiation.
• While the total emissivity of a perfect black body is unity, the same for a real body is
• The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body).
• A perfect black body is the one which
• Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
• Two large closely spaced concentric spheres (both of which are perfect black body radiators) are maintained at temperatures of 127?C and 27?C respectively. The space in between the two spheres is evacuated. Taking Stefan Boltzmann constant as 5.67 x 108 watt m2K the rate of radiation in watts per sq. m between the two spheres is approximately
• Absorptivity and reflectivity of a perfect black body are respectively
• Emissivity of a white polished body in comparison to a black body is
• Which one gives the monochromatic emissive power for black body radiation?
• Which one of the following approximates to the black body condition?