Which of the following statement about radiant heat is/are not correct?I. Radiant heat cannot travel through a vacuumII. Rough surfaces emit radiant energy better than polish surfacesIII. Dark surfaces absorb radiant heat better than bright surfaces

Which of the following is a TRUE statement about heat transfer:A) If an object is a good absorber of radiation, it is a poor emitter of radiation.B) Humans constantly radiate and absorb thermal radiation but on average, in winter, they radiate more heat than they absorb.C) Heat transfer by thermal radiation propagates slower than thermal conduction.D) Heat transfer by conduction propagates at speed of light.E) Convection takes place in gases and solids.F) Radiation needs medium to propagate.

Using the information given in the graph, what conclusion may be reached about black surfaces?Black surfaces are good at absorbing and emitting infrared radiation.Black surfaces are poor at thermal conduction.Black surfaces are good at conducting electricity.Black surfaces are poor at absorbing and emitting infrared radiation.

Which form of radiant energy carries heat?Infrared radiationVisible lightUltraviolet radiationRadio waves

Which of the following is a FALSE statement about heat transfer:A) If an object is a good conductor of heat, it is a poor insulator.B) Even inside a cold room objects constantly radiate and absorb heat.C) Convection is the fastest form of heat transfer.D) Heat transfer by radiation propagates at the speed of light in a vacuum.E) Convection takes place in fluids.F) Radiation does not need a medium to propagate.Group of answer choices

Which of the following statements is/are true?(i) Radiance gives a measure of the energy an observer perceives from a lightsource(ii) Saturation is the aspect of colour that varies as white light is added tomonochromatic light(iii) Luminance represents perceived radiance