AKN / Ultraviolet Radiation (UV) /
Learn about Ultraviolet B (UVB) Rays
What is ultraviolet B (UVB) rays?
UVB is a type of UV.
UVB is a type of medium wavelength. (1)
UVB affects the cells in the top layer of skin. (1)
UVB has short-term effects of delayed tanning, sunburn, blistering. (1)
UVB has long-term effects of skin cancer, can contribute to puremature aging. (1)
UVB is about 5% of the Sun’s UV rays reach the ground of the Earth. (1)
Relative to UVA rays, UVB rains have shorter wavelengths and higher energy levels. (1)
What does UVB do?
UVB rays damage the outermost layers of the skin. (1)
UVB directly damaged DNA. (1)
UVB rays cause the most skin cancers. (1)
UVB rays can contribute to skin aging prematurely. (1)
UVB rays are partially absorbed by the ozone layer, but some rays still get through. (1)
Overexposure to UVB rays leads to sunburns. (1)
Usually, the effects of UVB rays are delayed, or appear a few hours after sun exposure. (1)
UVB rays do NOT penetrate windows, and are more likely to be filtered by clouds. (1)
What contains UVB?
What are sources of UVB?
sunlight
tanning beds
Most tanning beds are a combination of UVA and UVB rays. (1)
Resources
1. https://www.healthline.com/health/skin/uva-vs-uvb#uv-radiation
