Physics P1 1.2 Surfaces and radiation

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What surfaces emit infrared radiation more quickly?
Dark, matt surfaces emit infrared radiation more quickly than light, shiny surfaces.
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What surfaces absorb infrared radiation more quickly?
Dark, matt surfaces absorb infrared radiation more quickly than light, shiny surfaces.
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Why are light, shiny surfaces slower at absorbing infrared radiation?
Light, shiny surfaces reflect more infrared radiation than dark, matt surfaces.
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What happens to an object painted dull black and left in the Sun?
It will become hotter than the same object painted shiny white.
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Why do dark, mat surfaces cool down more quickly than the same object painted shiny white?
Dark, matt surfaces are also good emitters of infrared radiation so they transfer the energy quicker.
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What prevents light, shiny surfaces from being good absorbers and emitters?
They are good reflectors of infrared radiation.
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Why are houses in hot countries often painted white?
Houses in hot countries are usually painted white because white is the worst absorber of infrared radiation.
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Why are the pipes on the back of a fridge usually painted black?
The pipes on the back of a fridge are usually painted black because black surfaces are the best emitters of infrared radiation.
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Other cards in this set

Card 2

Front

What surfaces absorb infrared radiation more quickly?

Back

Dark, matt surfaces absorb infrared radiation more quickly than light, shiny surfaces.

Card 3

Front

Why are light, shiny surfaces slower at absorbing infrared radiation?

Back

Preview of the front of card 3

Card 4

Front

What happens to an object painted dull black and left in the Sun?

Back

Preview of the front of card 4

Card 5

Front

Why do dark, mat surfaces cool down more quickly than the same object painted shiny white?

Back

Preview of the front of card 5
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