World 1 · Reflection & Refraction · 5 minRefraction You See Every Day
Straws, coins, and mirages
Teaching this? Open projector mode
Everyday refraction: a straw looks broken in a drink, a coin appears in a cup you thought was empty when you add water, and hot roads shimmer with mirages as light bends through warm, less-dense air.
Check yourself
The classic "broken straw" in a glass of water is caused by…
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