What are UV Rays?
Ultraviolet (UV) rays are invisible rays that are part of the energy that comes from the sun. UV rays can burn the eyes, hair, and skin if these parts of the body are not properly protected, or if they undergo too much exposure to the sun. Nevertheless, UV rays are very useful in our ecosystem. UV rays assist our bodies in making vitamin D, which strengthens bones and teeth and helps our bodies build immunities to such diseases as Rickets and colon cancer. UV rays are also used to treat psoriasis; the rays slow the growth of skin cells, preventing the outbreak of the itchy patches for which psoriasis is known. UV rays have various commercial uses as well, including sterilization and disinfection. Some animals can see UV rays, and UV vision helps bees to collect pollen from flowers. In spite of all their positive uses, UV rays remain very harmful for anyone who spends a large amount of time in the sun without proper protection. The most common effect of exposure to UV rays is sunburn. S
