The SPF number for sunscreen is a rating of the sun protective factor of the sun screen.

Question

Quizplus · Accepted Answer

The SPF number for sunscreen is indeed a rating of the sun protective factor of the sun screen. It measures how effective a sunscreen is at protecting the skin from harmful UVB rays, which can cause sunburn, skin damage, and skin cancer. The higher the SPF number, the more protection the sunscreen offers. For example, an SPF 30 sunscreen will block about 97% of UVB rays, while an SPF 50 sunscreen blocks about 98% of UVB rays.

The SPF Number for Sunscreen Is a Rating of the Sun