P1 1.2 SURFACES AND RADIATION

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  • Created by: tgillmore
  • Created on: 22-02-14 19:13
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  • P1 1.2 SURFACES AND RADIATION
    • Which surfaces are the best EMITTERS of radiation?
      • Rescue teams use light shiny surfaces to keep accident survivors warm
      • DARK, MATT SURFACES ARE BETTER AT EMITTING RADIATION THAN LIGHT, SHINY SURFACES
    • Which surfaces are the best ABSORBERS and REFLECTORS of radiation?
      • When you use a photocopier, IR from a lamp dries the ink on the paper
        • Black ink absorbs more than white paper
      • A light, shiny surfaces absorbs less radiation that a dark, matt surface
        • A matt surface has lots of cavities
      • The radiation reflected from the matt surface hits the surface again
      • The radiation reflected from the shiny surface travels away from the surface
    • LIGHT, SHINY SURFACES ABSORB LESS RADIATION THAN DARK, MATT SURFACES
    • LIGHT, SHINY SURFACES REFLECT MORE RADIATION THAN DARK, MATT SURFACES

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