The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.

Related MCQs

• Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
• A grey body is one whose absorptivity
• A grey body is one whose absorptivity
• The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelength is found from the known rate of energy, which under the same condition would be emitted from a black surface by multiplying with the absorptivity. Above enunciation is known as
• The statement that the emissivity and absorptivity of a surface is surrounded by its own temperature are the same for both monochromatic and total radiation, is known as
• In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)
• The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body).
• When a body is in thermal equilibrium with its surroundings, the absorptivity and the emissivity of the body are same. This Law is known as
• If the absorptivity plus reflectivity of a body equals 1, then the body is known as
• The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m2 . The flux, when the element temperature is increased to 1000°C for the same furnace temperature is