UV light, or ultraviolet light, is a type of light that comes from the sun. It can be harmful to people because it can damage our skin and eyes. When we're outside for too long without protection, UV rays can cause sunburn, increase the risk of skin cancer, and even lead to eye problems like cataracts.
But not all UV light is bad! It also helps our bodies make vitamin D, which is important for strong bones and a healthy immune system. Vitamin D helps keep our bodies working well.
So, while we need to be careful and protect ourselves from too much UV light, a little bit is actually good for us! It's all about finding the right balance.