uv light

[CaptainSi]

whats the difference between uv and infa red

[Loosehead]

They are at either end of the visible spectrum:

http://www.usbyte.com/common/approximate_wavelength.htm

[heathfield]

Light has wavelength and frequency. Infra-red light is low frequency, while ultraviolet is high frequency. These frequencies lie outside the range observable by the human eye.

Imagine your eyes are like a radio receiver that can only pick up medium wave (MW) stations. Infra-red would be like long wave (LW), while ultra-violet would be like short wave (SW) or even VHF (FM). You know those other wavebands are there, but you're not able to tune into them with the receiver you've got.

[rojash]

Nicely put, heathfield.

[CaptainSi]

Thank you very much ...most helpfull

[Ausf-A]

another difference, albeit a less scientific one could be infra red causes heating of the skin, and UV light will over time, causes tanned skin and maybe skin cancer.

[CT]

As ps to heathfield's answer, UV has higher energy than infrared 'light'.