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Ultraviolet Light - 10 Interesting Facts!

  1. UV light lies in the invisible spectrum hence the name ‘black light’.

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  2. UV light is usually invisible, but depending on the conditions it can sometimes be seen down to about 310nm.
  3. UVA (315 – 400nm) is commonly used for tanning, aquarium lighting, inspection equipment, glow lights, entertainment uses etc.

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  4. UVB (280 – 315nm) is used for medical treatments, curing, water purification, forensic analysis, grow lights etc.
  5. UVC (200-280nm) is highly dangerous and can cause damage to eyes and skin. It is germicidal and can be used for air sterilisation. It penetrates the membrane of germs, bacteria, mould and dust mites, eliminating them.
  6. UV light can be seen by bees – it reflects off flower petals and the bees use it to direct themselves to the pollen.

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  7. The lifetime of traditional mercury lamps is just 2000 hours - UV LED’s have a lifetime of at least 20,000 hours.
  8. The market for UV LED’s is expanding rapidly, expected to reach $150m by 2016.
  9. Scorpions glow blue or green under UV light due to the presence of fluorescent chemicals.

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  10. UV light can be used to treat some skin conditions such as vitiligo, eczema and psoriasis. This is known as light therapy or phototherapy.
Source: rs-online.com
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