Anonymous asked in 科學及數學其他 - 科學 · 1 decade ago

characteristic of light bulb

characteristic of light bulb


in detail


1 Answer

  • Chau
    Lv 5
    1 decade ago
    Favorite Answer

    Light bulb.It is one kind of penetration circular telegram, (modern age usually for tungsten wire) heats up using the resistance the tiny silk thread to incandescent, uses for lamp which shines.

    The light bulb periphery by the glass make, maintains the filament at the vacuum, or under low pressure inert gas.The function is prevented the filament oxidizes under the high temperature.

    The majority of incandescent lantern festivals 90% transform the expended energy in the useless heat energy, is only short in 10% energy can become the light.

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