A perfect black body is a perfect __________ of radiation.

Related MCQs

• 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
• The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body).
• While the total emissivity of a perfect black body is unity, the same for a real body is
• According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to
• The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit
• A black body does not __________ radiation.
• Which one gives the monochromatic emissive power for black body radiation?
• A black body when hot, emits heat radiation of __________ wavelengths.
• In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)
• A perfect black body is one which