Question

Wave length of UV-A Rays:

• A. 50 nm – 100 nm
• B. 100 nm – 280 nm
• C. 280 nm – 320 nm
• D. 320 nm – 380 nm

Hint:

When considering sun protection, choose broad-spectrum sunscreens that cover both UV-A and UV-B rays to prevent skin damage.

Answer 1

The Correct Option is D

Understanding UV-A spectrum. UV-A rays have a wavelength range of 320 to 400 nm. These rays are part of the ultraviolet light spectrum that reaches the Earth from the sun. UV-A rays are known for their ability to penetrate deep into the skin, causing long-term skin damage such as premature aging and wrinkles. They can penetrate clouds and glass, making exposure possible even during cloudy weather or while indoors near windows.