Useful effects of UV are also there. Filters, locks etc use UV.
One of the useful effects of ultraviolet rays of the sun is in producing Vitamin D. UV rays are needed by the human body or skin to make Vitamin D. Exposure to UV rays also help in terms of skin conditions like psoriasis.
There is no such thing as sun cancer. Cancer caused by excessive exposure to ultraviolet rays is skin cancer.
Rays of the sun
UV RAYS!!! The sun is the major natural source of UV Rays. UV Rays are invisable. They are still a form of light rays. UV stands for Ultra Violiet Rays. These (UV) rays cause sunburn and damage the eyes. Overexposure of UV Rays can cause serious skin cancer. UV Rays, however, can have useful effects, too. They can destroy harmful organisms. UV RAYS!!! The sun is the major natural source of UV Rays. UV Rays are invisable. They are still a form of light rays. UV stands for Ultra Violiet Rays. These (UV) rays cause sunburn and damage the eyes. Overexposure of UV Rays can cause serious skin cancer. UV Rays, however, can have useful effects, too. They can destroy harmful organisms.Utraviolet rays
Sun Rays ^-^
Too much exposure to the ultraviolet rays from the Sun can prove to be fatal.
The sun's rays
It absorbs UV rays from the sun. These are fatal rays of the sun.
Ultraviolet rays.
Ultraviolet rays from the Sun cause sunburns.
Ultraviolet rays cannot be seen or felt. Ever had a sun-burn? I say UV rays can be felt.
they are called UV, or Ultraviolet rays.