Thread: Ultraviolet Light

Hello. I realise that I may not be helped as I am not a regular here, but here I go.

I am having trouble finding some good information about Ultraviolet light. I need to know at least the following for my project:
• Speed of travel
• Frequency range
• Wavelength range
• Uses
• Properties
• Dangers
• Safety precautions
• Interesting facts or information

I am not asking anyone to list these things out (but I would appreciate that ), but I would really be happy if someone could point out a few good sites that have this information. Thanks a lot in advance.

Leeeet's seeeee:
-Speed of travel.....hmmmmmm what might that be. Oh yeah, it's c (at least with a good apporximation) and that is.....look it up in some encyclopedia
-Wavelength range: depends on the definition but starting below the visible range and goes down to extreme UV so let's say 280nm to 10 nm
-Frequency range: have a look at the correlation between wavelength and frequency. SHould be easy to find in Wiki or some such
-Uses: Depends on who you ask: Paris Hilton or a physicist
Medical: treatment of skin conditions like Psoriasis, desinfection
Physics: IC-production (think: small scale patterns have to be photographically transferred to some substrate. Can you do that with visible??)
Others: water treatment
And there are many more. Wiki is your friend
-Properties: ??? Think about the correlation between wavelength and energy. What is light in the first place? Look up wave-particle dualism.
-Safety precautions: What do you do to prevent sunburn? See....

Thanks a lot for that, really appreciated.

Originally Posted by Twaaannnggg

Leeeet's seeeee:
-Speed of travel.....hmmmmmm what might that be. Oh yeah, it's c (at least with a good apporximation) and that is.....look it up in some encyclopedia
-Wavelength range: depends on the definition but starting below the visible range and goes down to extreme UV so let's say 280nm to 10 nm
-Frequency range: have a look at the correlation between wavelength and frequency. SHould be easy to find in Wiki or some such
-Uses: Depends on who you ask: Paris Hilton or a physicist
Medical: treatment of skin conditions like Psoriasis, desinfection
Physics: IC-production (think: small scale patterns have to be photographically transferred to some substrate. Can you do that with visible??)
Others: water treatment
And there are many more. Wiki is your friend
-Properties: ??? Think about the correlation between wavelength and energy. What is light in the first place? Look up wave-particle dualism.
-Safety precautions: What do you do to prevent sunburn? See....

The speed of light is a constant, c, or 186,282.4mps (in a vacuum). The correlation of wavelength/frequency is proportional. UV waves has a frequency of 14 millionths/inch. The best uses I can think of is for a tan, cooking ants with a magnifying glass, and creating polarized lenses (UV light does not travel through windshields)! UV rays are characterized best in a wave format. To sum up, if your going out side, and its sunny as all hell, then wear sunscreen, or stand behind some glass!