UV rays, or ultraviolet rays, are a type of electromagnetic radiation that are emitted by the sun. They are classified as UVA, UVB, and UVC rays, with UVA and UVB being the most common types that reach the Earth’s surface. UVA rays are responsible for tanning and aging of the skin, while UVB rays are responsible for sunburns and are the primary cause of skin cancer. UVC rays are mostly absorbed by the ozone layer and do not reach the Earth’s surface. It is important to protect yourself from UV rays by using sunscreen, wearing protective clothing, and limiting your time in the sun, especially during peak hours. UV rays can also cause damage to the eyes, leading to cataracts and other eye problems.