What percentage of summer sunlight is attributed to UVB radiation?

The correct response highlights that UVB radiation accounts for approximately 5% of the total sunlight that reaches the Earth's surface during the summer months. This percentage accurately reflects the lower proportion of UVB in relation to the broader spectrum of sunlight, with UVA radiation making up a much larger part.

Understanding the role of UVB is crucial, as it is responsible for producing vitamin D in the skin and can contribute to skin damage and sunburn. The distinction between UVA and UVB is significant in the tanning industry, as both types of radiation have different effects on the skin.

In summer, while the intensity of sunlight increases and more people are exposed to it, UVB radiation still represents only a small fraction of total solar radiation. Knowing this percentage can help professionals in the tanning and skincare industries better inform clients about the risks and benefits associated with sun exposure.