unit 1 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: SLowtherCreated on: 10-11-16 17:08 What is infrared radiation? Infrared radiation is heat energy travelling through the air as waves. No particles are involved. 1 of 7 What can infrared travel as? Infrared travels through the air as waves through a vacuum. No medium is required. 2 of 7 What do all objects do? What effects this? all objects emit infrared radiation. the hotter the object the more infrared radiation it emits. 3 of 7 what surfaces are the best emitters of radiation? Dull,black surfaces are the best emitters and absorbers of radiation. 4 of 7 what surfaces are good reflecters of radiation? shiny silver surfaces are the best at reflecting radiation but not good at absorbing it. 5 of 7 Why are radiators painted black? Black is a good emitter of radiation so it gets rid of the heat. This means the heat transfers from the radiator more quickly. 6 of 7 What are the three states of matter? Solids, liquids and gases 7 of 7
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