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Does Ultraviolet (UV) Light Pass through Some Colo...

Talk It OverLight travels in waves. The waves have different lengths called (no surprises here!) wavelengths. Different colors of light have different wavelengths. Red light, for example, has a longer ...

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What Is the Most Effective Sunscreen?

The sunscreen industry markets its products with SPF (Sun Protection Factor) ratings. Sunscreen products of various SPF ratings will be tested for their UV absorbance and effectiveness.Earth's atmosph ...