Which statement correctly matches UV bands to their typical characteristics and effects?

Which statement correctly matches UV bands to their typical characteristics and effects?

• A. UVA is the most dangerous and causes the most severe sunburn.
• B. UVB is the middle-wave band and is associated with the greatest risk of sunburn and eye damage.
• C. UVC is a long-wave band primarily used for tanning.
• D. Infrared radiation is a form of UV radiation.

Answer: (B)

Understand that UV radiation reaches us in three main bands ordered by wavelength: UVA is the longest, UVB is the middle, and UVC is the shortest. UVA penetrates deeper into the skin and contributes to aging and some eye damage but is less associated with the immediate, painful sunburn that comes from UVB. UVB deposits more energy in the outer skin layers, making it the primary cause of sunburn and a significant factor in eye surface damage when exposure is enough. UVC is so short in wavelength that it is almost entirely blocked by the Earth's atmosphere, so it doesn’t reach the surface and isn’t used for tanning. Infrared radiation is not UV at all; it’s a different part of the spectrum associated with heat. So the statement that UVB is the middle-wave band and is linked to the greatest risk of sunburn and eye damage best reflects how these bands behave and impact exposure.

Understand that UV radiation reaches us in three main bands ordered by wavelength: UVA is the longest, UVB is the middle, and UVC is the shortest. UVA penetrates deeper into the skin and contributes to aging and some eye damage but is less associated with the immediate, painful sunburn that comes from UVB. UVB deposits more energy in the outer skin layers, making it the primary cause of sunburn and a significant factor in eye surface damage when exposure is enough. UVC is so short in wavelength that it is almost entirely blocked by the Earth's atmosphere, so it doesn’t reach the surface and isn’t used for tanning. Infrared radiation is not UV at all; it’s a different part of the spectrum associated with heat. So the statement that UVB is the middle-wave band and is linked to the greatest risk of sunburn and eye damage best reflects how these bands behave and impact exposure.