SODIUM SPECTRUM LAMP

SODIUM SPECTRUM LAMP

This Sodium Spectrum Lamp comprises an enclosed sodium lamp, with shield protecting it, sitting  on top of the power supply. Has a built-in power supply. The cheapest sodium light source and power supply for diffraction and spectra experiments that we know of.

(Wikipedia excerpt: ..."...A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.

Two varieties of such lamps exist: low pressure, and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used.[1] High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps.[2] Low-pressure sodium lamps give only monochromatic yellow light, inhibiting color vision at night.

Single ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass gas discharge tube (arc tube) with a metal cap.[3][4] They include the sodium-vapor lamp that is the gas-discharge lamp used in street lighting...

The low-pressure sodium arc discharge lamp was first made practical around 1920 owing to the development of a type of glass that could resist the corrosive effects of sodium vapor. These operated at pressures of less than 1 Pa and produced a near monochromatic light spectrum around the sodium emission lines at 589.0 and 589.56 nanometres wavelength. The yellow light produced by these limited the range of applications to those where color vision was not required....")

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