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Wet sand

Robert & Jean Pollock, Visuals Unlimited/SPL

The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and Highers/Advanced Highers exam specifications.

Why does wet sand look darker than dry sand? The explanation involves refraction and total internal reflection of light.

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