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Cool. Total internal reflection is also one of the reasons that diamonds are so sparkly. 💍

Why do things look darker when they're wet? I talked to a (very patient) optics expert, so that now I can explain it to you! From sweat stains to wet footprints by the swimming pool, this is relevant summer science! Please check it out and pass it on. 🧪 news.ncsu.edu/2024/07/why-...

Why Do Things Look Darker When They’re Wet?news.ncsu.edu From rain-soaked sidewalks to sweat-stained dress shirts, you’ve probably noticed that most things look darker when they’re wet. Why?

Here's a nice diagram of total internal reflection in a diamond 🎢