Heat · Chapter 3: Radiation and keeping heat in
Year 11 Science · About 15 minutes with activities · Turn your sound on
Chapter 3 recap
- Radiation is the transfer of heat without particles of matter (e.g. infrared from the sun). It can travel through a vacuum; conduction and convection cannot.
- Dark, matte surfaces are good absorbers and emitters. Light-coloured and shiny surfaces are poor absorbers and emitters; shiny silver reflects the most.
- A survival blanket reflects radiated heat back to the body. Thermos flasks, double glazing, chilly bins and hāngī reduce conduction, convection and radiation.
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