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Infrared radiation and surfaces

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Presentation on theme: "Infrared radiation and surfaces"— Presentation transcript:

1 Infrared radiation and surfaces

2 Here are three different coloured mugs of the same size

3 If we fill all three mugs with the same amount of water and leave them in the sun, which one will heat up quickest?

4 The black mug would heat up quickest because black is good at absorbing infrared radiation.

5 A dark surface is also a good emitter of radiation
A dark surface is also a good emitter of radiation. A light shiny surface is a poor emitter of radiation.

6 The inside of a vacuum flask is silver to reduce infrared radiation and stop your drink heating up or cooling down too quickly.

7 This is why the houses in the Mediterranean are white
This is why the houses in the Mediterranean are white. It helps them stay cool in the summer!


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