There are numerous uses for UV, which vary with wavelength. Here's a link which may help you:
http://en.wikipedia.org/wiki/Ultraviolet
A few uses of UV are:
Curing
Sterilization
Purification
Black Light
UV rays
Too much exposure to the ultraviolet rays from the Sun can prove to be fatal.
Ultraviolet rays from the Sun cause sunburns.
X-rays and gamma rays from the sun are black by the atmosphere. The ozone layer partially blocks out ultraviolet rays, but some do get through, creating a risk of sunburn, skin cancer, and eye damage.
Gamma rays have more energy than ultraviolet rays. Gamma rays are the most energetic form of electromagnetic radiation, with wavelengths shorter than ultraviolet rays, making them more penetrating and powerful.
Ultraviolet rays
there is no answer and there never will be
Ultraviolet (UV) waves can be used to kill bacteria, but are also harmful to humans. X-Rays are used to analyze bones etc
Bees can see ultraviolet rays.
Protection from Ultraviolet rays/sunlight
Hairdressers typically do not use ultraviolet rays in their services. Ultraviolet rays are more commonly used in tanning beds or sterilization processes in salons, but caution is needed as UV exposure can be harmful to skin and eyes.
Johann Wilhelm Ritter discovered ultraviolet rays
Yes, X-rays and gamma rays have higher frequencies than ultraviolet rays.
Both Gamma Rays and X Rays have a much high frequency that Ultraviolet Rays.
The next name of wavelengths longer than ultraviolet rays is "violet light".
Ultraviolet rays cannot be seen or felt. Ever had a sun-burn? I say UV rays can be felt.
This statement is incorrect. Infrared rays have a longer wavelength than ultraviolet rays. Infrared rays have wavelengths longer than visible light, while ultraviolet rays have wavelengths shorter than visible light.