Low Pressure Mercury Vapour Lamp

Again transition of the electrons requires least amount of input energy from a colliding electron.

Low pressure mercury vapour lamp.

Low pressure mercury vapor lamps do they always produce both 184 5nm and 253 7nm. Active 5 days ago. Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed. Low pressure lp amalgam low pressure lp and medium pressure mp lamps are all mercury based lamps.

In low pressure mercury vapor lamps only the lines at 184 nm and 254 nm are present. In medium pressure mercury vapor lamps the lines from 200 600 nm are present. One would tip the lamp and electrical contacts on each side of the lamp would send electricity through a liquid mercury which started the lamp. What s the difference between low pressure lp amalgam low pressure lp and medium pressure mp uv lamps.

Amalgam lamps use a mercury amalgam mix to control mercury vapor pressure. This question is off topic. A mercury vapor lamp whose partial pressure during operation does not exceed 0 001 atmosphere. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60 of the total input energy gets converted into 253 7 nm single line.

Closed ask question asked 5 days ago. These types of lamps are available in ozone producing and ozone free quartz with a variety of phosphors. The first mercury vapor lamps were in a lower pressure tube. Low pressure mercury vapour lamp hg 2 lamp heraeus has developed a compact low pressure low voltage mercury vapour lamp type hg2 principally for use in scientific instrumentation.

Mercury vapor conducts electricity completing the circuit. Lamp output in the uv range depends on the amount of mercury and vapor pressure of mercury in the lamp. Viewed 18 times 0 begingroup closed. It is not currently accepting answers.

This lamp has a highly stable output predominantly at the 253 7 nm mercury line. Rather than a cold spot the lamp s amalgam spot on pellet regulates mercury vapor pressure during operation and yields up to three times the uvc output of a standard low pressure mercury lamp of the same length. Fluorescent and germicidal lamps are included in this. The blue green tint of mercury vapor lamps is caused by the strong violet and green lines.

Find out information about low pressure mercury lamp. Often called germicidal or ozone absorption lamps they are very stable light sources. As pressure increases the chance of multiple collisions gets increased.