What are the two main types of ultraviolet rays relevant to tanning?

The two main types of ultraviolet rays that are relevant to tanning are UVA and UVB. UVA rays penetrate the skin more deeply than UVB rays and are primarily responsible for long-term skin damage, contributing to premature aging and the formation of wrinkles. These rays are present even on cloudy days and throughout the year.

UVB rays, on the other hand, are responsible for causing sunburn and play a significant role in the development of skin cancer. They affect the outer layers of the skin and are more intense during the summer months, particularly between 10 a.m. and 4 p.m.

Both types of UV rays are crucial to understand in the context of tanning because they interact differently with the skin and have varying impacts on skin health. In tanning practices, knowledge about the risks and effects of UVA and UVB exposure is essential for making informed choices to protect skin while achieving desired tanning results.