How is a UV lamp made?
A UV lamp is different from a regular lamp because it’s typically made of quartz instead of glass. Inside, there is an inert gas mixed with mercury. When the lamp is plugged in, electricity reacts with the mercury, and the lamp produces UV light. The type of UV light emitted depends on the pressure inside the lamp.
How do you calculate UV light?
How to Calculate UV-C Dose on a Surface
- To get accurate dose data you need to start with a UV-C detector.
- UV Dose = UV Intensity (μW/cm² ) x Exposure Time (seconds)
- Exposure time is how long the UV light is ON and delivering UV to a surface.
- This value can be compared to the table below for various microorganisms.
How does UV production work?
Ultraviolet radiation is produced by high-temperature surfaces, such as the Sun, in a continuous spectrum and by atomic excitation in a gaseous discharge tube as a discrete spectrum of wavelengths.
What is UV light bulb made of?
The ultraviolet lamp usually consists of an electric discharge lamp with material that yields radiations at the desired wavelength. Ultraviolet lamps are usually housed in quartz or special glass that transmits ultraviolet radiation more readily than ordinary glass.
What are 3 facts about ultraviolet?
46 Fascinating Facts About Ultra Violet Light and Radiation
- UV light can damage the human skin.
- UV light or phototherapy vitiligo treatment can help create repigmentation.
- Possible eye damage can result from high doses of UV light, particularly to the cornea which is a good absorber of UV light.
What is the temperature of UV light?
Medium-pressure UV lamps typically operate at a quartz tube surface temperature of approximately 900°C. The infrared delivered to a surface is primarily a function of the surface area of the bulb and follows the Stefan-Boltzmann Law.
What is the main function of UV lamp?
Many UV light bulbs belong to a class of lights known as germicidal lights, the purpose of which is to rid surfaces of biological contaminants. In fact, many UV bulbs are highly efficient at cleansing surfaces not only of bacterial life but of viruses as well.
What is the wavelength of light emitted from a UV lamp?
Lamps may emit very specific UVC wavelengths (like 254 nm or 222 nm), or they may emit a broad range of UV wavelengths. Some lamps also emit visible and infrared radiation. The wavelengths emitted by the lamp may affect the lamp’s effectiveness at inactivating a virus and may impact the health and safety risks associated with the lamp.
What type of light is used to produce UVC?
Low-pressure mercury lamp: Historically, the most common type of lamp used to produce UVC radiation was the low-pressure mercury lamp, which has its main (>90%) emission at 254 nm. Other wavelengths are also produced by this type of lamp.
What are UV light detecting beads made of?
The dye molecules in our Ultraviolet Light Detecting Beads consist of two large, planar, conjugated systems that are orthogonal to one another. No resonance occurs between two orthogonal parts of a molecule.
How does UVC light affect DNA and RNA?
It is fascinating to note that that DNA and RNA absorb UVC light energy very well at 254 nm. This absorption characteristic combined with UVC light of the proper energy ( intensity) can render infectious organisms harmless by eliminating their ability to reproduce.