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thermal imaging

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gemweeks | 15:54 Fri 09th Dec 2005 | How it Works
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how does thermal imaging work?

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Avatar Image Skids
Heat gives off light in the infra-red spectrum (range of frequencies). An infra-red sensitive camera picks up these frequencies and converts them to corresponding frequencies in the visible spectrum so that we can see them. High heat is usually shown as white/bright yellow going right the way through red, green, blue and to dark violet/black for little or no heat.
13:30 Sat 10th Dec 2005
Avatar Image fo3nix
Skids: heat doesn't give off light in the infra-red spectrum, heat _is_ light in the infra-red spectrum.
18:28 Sat 10th Dec 2005
Avatar Image Skids
Heat is the transfer of energy by infra-red radiation.
08:27 Sun 11th Dec 2005
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