ULTRAVIOLETS

WAVE LENGTH, FREQUENCY, AND ENERGY LEVEL OF ULTRAVIOLETS

• The wavelength of ultraviolet light is between 4000-100 nanometers
• The frequency range is 10^16
• The energy level corresponding to photon energies from 3.10-12.4 eV
• Sunscreen and clothes can block UV rays.

WHERE DOES ULTRAVIOLET LIGHT FALL ON THE EM SPECTRUM

• Ultraviolet falls between visible light and x-rays (purple/violet)
• Ultraviolets can go through gas.
• Sunscreen can block ultraviolet waves.
• Johan Ritter discovered ultraviolet lights in 1801.

The history behind ultraviolet lights

• Was discovered in 1801
• Was discovered by John Ritter
• John Ritter was a German physicist
• The discovery of UV radiation below 299nm, named vacuum ultraviolet

ARE ULTRAVIOLETS BROKEN UP INTO SUBDIVISIONS?

• Ultraviolet rays can be subdivided into three wavelength bands.
• Theses wavelength bands are named UV-A, UV-B, UV-C.
• UV-A is the least energetic and least harmful.
• UV-B rays have a lower energy level and a longer wavelength.
• UV-C is the most energetic and most harmful.

THE END