A perfect black body is one which

Related MCQs

• Emissivity of a white polished body in comparison to a black body is
• All radiations in a black body are
• The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
• The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit
• When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
• 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the absorptivity of surface is
• When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
• Heat flows from one body to other when they have
• A grey body is one whose absorptivity
• The amount of heat flow through a body by conduction is