Scientists used lasers to make 'smoke rings' of light - Science News for Students

Physicists had a bright idea: Make light into swirling, ring-shaped vortices, similar to smoke rings or bubble rings.

blow: (noun) A term for the materials exhaled by whales through their blowholes. This can include air, mucus, germs and sometimes even seawater. dolphins: A highly intelligent group of marine mammal… [+3454 chars]

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