Sources of light

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The light source is any object that emits electromagnetic energy in the visible spectrum. By their nature, are divided into artificial and natural.

Light source classification:

Incandescent - lighting device, artificial light source. Light is emitted by a heated metal spiral when an electric current flows through it.

Discharge lamps - a source of light that emits energy in the visible range. Physical basis - electrical discharge in metal vapors.

The luminescent lamp is a gas-discharge light source, the luminous flux of which is determined mainly by phosphorus luminescence caused by the emission of ultraviolet radiation; Apparently the discharge does not exceed a few percent. Fluorescent lamps are widely used for general lighting, and their light exposure is several times greater than that of incandescent bulbs for the same purpose. The lifespan can be up to 20 times longer than incandescent bulbs.

Halogen lamps - incandescent bulbs that are added Buffer gas pairs of halogens (bromine or iodine). This increases the lamp life up to 4000 hours.

Compact Fluorescent Lamp (CFL) or fluorescent energy-saving lamp. A lamp with smaller dimensions and less sensitive to mechanical damage.

LED lamp is a semiconductor device that emits incoherent light while simultaneously passing an electric current.

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