Table of Contents
How does a mercury Vapour lamp work?
The mercury vapor lamp works by creating an electric current to mercury vapor within a sealed glass jacket. The bulb is comprised of an inner tube, called the arc tube, and an outer jacket (or bulb).
What color is mercury vapor light?
Sodium vapor and mercury vapor lamps emit yellow and bright blue light, respectively. They are very efficient, and provide high-intensity light suitable for illuminating large, open areas.
What is mercury vapor security light?
The set-up of a mercury vapor lamp is similar to that of a metal halide lamp. The lamp uses an inner arc tube that is generally made of fused quartz. The job of the outer bulb is to keep heat in and help lower the amount of ultraviolet (UV) light emitted by the lamp.
Is mercury Vapour lamp used in home?
Standard mercury vapor lamps have found greatest use in industrial applications and outdoor lighting, because of their low cost and long life (16,000 to 24,000 hours), with lamp sizes ranging from 40 to 1,000 watts….Best Applications.
| Self-Ballasted Mercury Vapor Lamp | Incandescent Lamp |
|---|---|
| 450 – 500 watts | 300 – 750 watts |
How Mercury Vapour produced?
Elemental mercury vapor is emitted into the atmosphere from both natural and anthropogenic sources. Although volcanoes are an important natural source, coal-burning power stations, and municipal waste incinerators make up the bulk of man-made contributions (40\% of the mercury emissions in the United States).
How is mercury vapor made?
The set-up of a mercury vapor lamp is similar to that of a metal halide lamp. The lamp uses an inner arc tube that is generally made of fused quartz. Once the electrical current starts, the inside of the lamp begins to heat up, ultimately causing the mercury droplets to vaporize and mix with the argon gas inside.
Is Mercury Vapour lamp monochromatic?
There is no monochromatic light.
Is mercury Vapour lamp monochromatic?
Why mercury is used in lamps?
It is useful in lighting because it contributes to the bulbs’ efficient operation and life expectancy. Fluorescent and other mercury-added bulbs are generally more energy efficient and last longer than incandescent and other equivalent forms of lighting, except for light-emitting diode (LED) lamps.
Is mercury a vapor?
At room temperature, exposed elemental mercury can evaporate to become an invisible, odorless toxic vapor. If heated, it is a colorless, odorless gas.
How is mercury used in lamps?
They produce light when electric current passes between two electrodes (also called cathodes) in a tube filled with low-pressure mercury vapor and inert gases, such as argon and krypton. The electric current excites the mercury vapor in the tube, generating radiant energy, primarily in the ultraviolet (UV) range.
Which position MB type high pressure mercury Vapour lamps are operated?
Mercury Vapour lamps operating at high pressure (but below 100 watts per centimetre of arc length) and with arc tubes of quartz glass are classified as the MB style. Mercury vapour pressure is typically around ten atmospheres.
What are mercury vapor lamps used for?
Mercury vapor lamps are bright, long-lasting light sources that are often used to light large areas such as streets, gyms, sports arenas, banks, or stores. The bulbs have an inner quartz tube containing the mercury vapor discharge.
What is the resistor at the bottom of a mercury vapor lamp?
The small diagonal cylinder at the bottom of the arc tube is a resistor which supplies current to the starter electrode. A mercury-vapor lamp is a gas discharge lamp that uses an electric arc through vaporized mercury to produce light.
How does a color corrected 80 watt mercury vapor lamp work?
Warm-up of a color corrected 80 W high-pressure mercury vapor lamp to half brightness. When a mercury vapor lamp is first turned on, it will produce a dark blue glow because only a small amount of the mercury is ionized and the gas pressure in the arc tube is very low, so much of the light is produced in the ultraviolet mercury bands.
What is the wavelength of light in a mercury vapor lamp?
Only the light at 253 nm is usable. Synthetic quartz can be used in the manufacturing to keep the 184 nm light from being absorbed. In medium-pressure mercury-vapor lamps, the lines from 200–600 nm are present. The lamps can be constructed to emit primarily in the UV-A (around 400 nm) or UV-C (around 250 nm).