Ultraviolet Light

Period 3 By: Jasmine Mascote

Electromagnetic Waves

One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Ultraviolet lights

Electromagnetic radiation shorter than that of visible light but longer than X-rays. Usually invisible under some conditions children and young adults can see ultraviolet down to wavelengths of about 310 nm, and people with aphakia (missing lens) can also see some UV wavelengths.

Wave lengths

400nm - 10nm

nm = nanometers

Frequency

7.5x10^14 -3x10^16 Hz

Everyday Applications

  • Sun tanning
  • Forensics
  • Security

Health impacts (Good)

  • Small amounts of UV are beneficial for people and essential in the production of vitamin D.
  • Used to treat several diseases, including rickets, psoriasis, eczema and jaundice.

Health impacts (bad)

  • Sunburn is the best-known acute effect of excessive UV radiation exposure.
  • Induces degenerative changes in cells of the skin, fibrous tissue and blood vessels leading to premature skin aging, photodermatoses and actinic keratosis.
  • Inflammatory reaction of the eye.
  • In the most serious cases, skin cancer and cataracts can occur.

Article on Ultraviolet light

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