infrared radiation既問題

點解blackened theromometers 可以detect到infrared radiation?? 點解要blackened??

1 Answer

  • 天同
    Lv 7
    1 decade ago
    Favorite Answer

    A good radiator of heat is also a good absorber of heat.

    Because black surface object, when heated, will emit radiation of all possible wavelengths (The black-body radiation principle).

    A black surface thus absorbs radiation of all wavelengths, including visible and infrared radiation.

    The temperature so recorded by the thermometer is called the [Radiation Temperature], it is used to indicate the radiant energy emitted by the surrounding environment.

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