Illume is having main effect to human activity, in ancient time the person is used burn the means such as candle of oily, dot to obtain lamplight, it is nightly and OK to be used even the firebug of glow serves as illuminant.
Advance day period, have a person that is called Che Yin, as a child academic tireless, the time of evening of the same night also does not agree to be let off for nothing. But as a result of the home in very poor, can not afford the oil that light a lamp, so every arrive Xia Ye, he catchs a lot of firebug, put inside the bag that has small hole, the light that uses firebug will read a book. The Che Yin of result grind eventually stand out, final Guan Zhili ministry minister. In addition, ancient books " Gu Jin secret encloseds ground for growing trees " also once account: "Take insolation of ovine bladder huff, enter firebug more than 100, fasten at a square-shaped fishing net with pole as supports thenar grain, group size of piscine not stick to, each approach its light, get together and do not move, catch surely much. " this is the story that the light that uses firebug fishs.
The body rear of firebug has a glow implement, include 3 shares: Cell of the skin, glow and reflector. Shoot the light that come out by glow cell place, appear as a result of the reflex of reflector brighter. The main material in glow cell is bug fluorescence element and fluorescence are enzymatic. Bug fluorescence element is the origin that produces light energy, fluorescence is enzymatic it is activator. When firebug begins an activity, breath is accelerated, the engulf inside body is many oxygen, oxygen enters glow cell through persnickety canal, bug fluorescence element falls in the catalysis with enzymatic fluorescence, begin to produce oxidation reaction, bring about an abdomen to allot a brightness to come. What breathe section law because of firebug is different, form light and shade, look like flickering " starlet " .
Because bug is fluorescent the efficiency of element changeover energy is very tall, the energy waste that makes an appointment with 2%%~10%% only among them is on heat energy, the others energy uses irradiation, accordingly the glow of firebug can call a kind " cold light " , physicist thinks this is very ideal lamplight. Incandescent lamp
As civilized progress, the mankind tries all sorts of methods in order to obtain light source.
Arrive all the time on October 21, 1879, in the lab that accumulates full dirt in a of American new jersey, edison seals very fine carbonization fiber silk inside bubble of a glass, use vavuum pump to pump the air in vitreous bubble, stabilize ground supply voltage again, make filament becomes a very steady bright light source, times of electric power illuminative arrives from now on.
Although the form of incandescent lamp, appearance and color have incomputable sort, but its composition includes lamp holder, filament, fill to wait for a part in the bulb of the gas inside bulb and isolation outside. Lamp holder is the device that uses a bulb connection to lamp holder, filament is the component that irradiation uses truly in bulb. Generally speaking, the working temperature of filament is higher, the part that the energy that produces is located in visible light area is larger. Filament is the earliest be will make with carbon, but convert with respect to all later tungsten filament, the melting point that the reason is tungsten is high, damage not easily, and spectral character relatively beautiful, have heatproof combat cold strength. The gas of fill uses inert gase normally, can use force to filament, prevent filament evaporate. Bulb is to be used as completely cut off as the outside, if do not isolate, filament can be mixed immediately the oxygen in air reacts and burn down.
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