Why does light choose the path it does when crossing between media? 🌈 This video presents a clear max–min derivation of Snell’s Law from Fermat’s Principle, showing how extremizing travel time leads ...
Nancy Bullard on MSN
Watch water beads vanish with a simple science trick
In this video, I use transparent water beads to create an awesome disappearing act right in my classroom. I fill a bowl with ...
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