How Sunscreen Protects Against Harmful UV Rays

The video explains how sunscreen protects the skin from harmful sun rays by using organic and inorganic chemicals to filter light. It distinguishes between sunscreen and sunblock, highlighting their different mechanisms. Sunscreen absorbs UV radiation, while sunblock reflects it. The video details the types of ultraviolet light (UV-A, UV-B, UV-C) and their effects on the skin. It also explains how sunscreen's organic molecules absorb UV rays and release them as heat. The concept of SPF (Sun Protection Factor) is discussed, indicating how long one can stay in the sun without getting sunburned, focusing on UV-B protection.

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