how does sunscreen work?
In: Chemistry
Light is a broad spectrum, we can only see a very tiny part of it. Most of a sunburn is caused by UV light. Sunscreen is basically an opaque paint for UV light, but clear for visible light. If you look at someone putting on sunscreen using a camera that can see UV light, it looks like they are smearing black paint on. It blocks the UV light from hitting your skin.
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