Home

What is the correct answer?

4

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

Correct Answer :

D. Black body


Related Questions

Reynolds number is the ratio of Heat transfer by radiation mainly depends upon A grey body is one whose absorptivity Thermal conductivity of water in general with rise in temperature According to Stefan Boltzmann law, ideal radiators emit radiant energy… According to Stefan's law, the total radiation from a black body per second… Thermal conductivity of solid metals with rise in temperature normally Depending on the radiating properties, a body will be black when A cube at high temperature is immersed in a constant temperature bath.… Heat conducted through per unit area and unit thick face per unit time… The process of heat transfer from one particle of the fluid to another… Depending on the radiating properties, body will be transparent when The ratio of the emissive power and absorptive power of all bodies is… Emissivity of a white polished body in comparison to a black body is The thermal diffusivities for gases are generally The heat is transferred by conduction, convection and radiation in Thermal conductivity of air at room temperature in kcal/m hr °C is… The total radiation from a black body per second per unit area is ________… The amount of heat flow through a body by conduction is Heat transfer takes place as per Which of the following is expected to have highest thermal conductivity? The energy distribution of an ideal reflector at higher temperatures is… Absorptivity of a body will be equal to its emissivity According to Kirchoff's law, the ratio of emissive power to absorptivity… Thermal diffusivity of a substance is given by (where h = Thermal diffusivity,… Sensible heat factor is given by (where S.H. = Sensible heat, and L.H.… Planck's law holds good for A non-dimensional number generally associated with natural convection… The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl… When heat is transferred by molecular collision, it is referred to as…