The radiations emitted by hot bodies are called as                                  

Related MCQs

• A black body is defined as a perfect absorber of radiations. It may or may not be a perfect emitter of radiations.
• As the wavelength of the radiation decreases, the intensity of the black body radiations                          
• Electromagnetic wave theory of light could not explain Black Body radiations.
• The disc of a siren containing 60holes rotates at a constant speed of 360rpm. The emitted sound is in unison with a tuning fork of frequency.
• The energy emitted by a black surface should not vary in accordance with
• Likewise the amount of emitted radiation is strongly influenced by the wavelength even if temperature of the body is
• The transfer of heat between two bodies in direct contact is called
• The curve for unsteady state cooling or heating of bodies is
• As the car slows down, the brake shoe and steel drum continuously absorbs 25 W. Assume a total outside surface area of 0.1 m2 with a convective heat transfer coefficient of 10 W/Km2 to the air at 20°C. How hot does the outside brake and drum surface become when steady conditions are reached?
• Thermal insulation keeps the room cool in winters and hot in summers.