In terms of energy, how do UVB wavelengths compare to UVA wavelengths?

The correct answer indicates that UVB wavelengths have more energy compared to UVA wavelengths. This distinction is crucial in understanding how different types of ultraviolet light affect the skin and other biological tissues.

UVB rays have a shorter wavelength than UVA rays, which means they are more energetic. The wavelengths of UVB rays range from approximately 290 to 320 nanometers, while UVA rays range from about 320 to 400 nanometers. As a general principle in physics, shorter wavelengths correlate with higher energy. Therefore, the energy contained in UVB rays is greater, which contributes to their more intense effects on the skin, such as causing sunburn and playing a significant role in the development of skin cancer.

The higher energy of UVB rays also means they can penetrate the skin more deeply than UVA rays, leading to more significant biological impacts. This is why UVB protection is a critical part of sun protection strategies, as it directly relates to skin damage and health risks associated with sun exposure. Understanding these differences is essential for making informed choices about skin care and sun protection.