What are uv-b rays?

UV-B rays are a type of ultraviolet radiation from the sun that have a wavelength of 280 to 315 nanometers (nm). They are more energetic than UVA rays, which have a wavelength of 315 to 400 nm, but less energetic than UVC rays, which have a wavelength of 100 to 280 nm.

UV-B rays are the primary cause of sunburn, and can also cause skin cancer, cataracts, and premature aging of the skin. They are also responsible for the production of vitamin D, which is essential for bone health.

The amount of UV-B radiation that reaches the Earth's surface varies depending on the time of day, the season, the latitude, and the weather conditions. UV-B rays are strongest during the middle of the day, in the summer, and in tropical regions. They are also stronger on clear days than on cloudy days.

There are a number of things that you can do to protect yourself from UV-B rays, including:

* Wearing sunscreen with an SPF of 30 or higher

* Wearing a hat and sunglasses

* Seeking shade during the middle of the day

* Avoiding tanning beds

If you are concerned about your exposure to UV-B rays, you can talk to your doctor.