UV- Rays are rays that are part of energy that comes from the sun.

Example of ultraviolet: is the sun the sun is a strong force of ultraviolet rays which gives off radiation and can cause sunburn.

Wave Length and fregquency

Wavelength- 400nm-1nm (The extreme ultraviolet range overlaps with the far ultraviolet at wavelengths of between 1 and 100nm)

frequency- 10 - 10 Hz

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4 uses for ultraviolet


  • Ultraviolet waves are effective in killing bacteria and viruses. Hospitals use germicidal lamps that produce these waves to sterilize equipment, water and air in operating rooms. It is also used to treat acne and psoriasis.

The Food and Drug industry uses germicidal lamps to disinfect various types of products and their containers. The main use of ultraviolet is in the manufacturing integrated circuits.


  • Scientists learn about the make up and energy levels of atoms by studying UV rays. Experts also learn abut distant stars and galaxies by analyzing the UV rays that are given off. Artificial sources of ultraviolet light are often used to stimulate the effects of solar ultraviolet radiation in the study of the deterioration of materials on exposure to sunlight.

  • Ultraviolet waves are used to identify materials by the glow or fluorescence under them.They are used to make black lights.
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Interesting Facts

  1. Experiments indicate that bees, birds, butterflies and other insects can see ultraviolet light.
  2. Ultraviolet rays cause chemical reactions in plants. If they are overexposed to it, it could kill them.