Uploaded October 2024 | Updated September 2026, 2 weeks ago

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This optical magic trick shows how light bounces around inside of glass instead of going right through it if it enters at the right angle

This laser demo demonstrates the basic principle behind how optical fibers work, sending laser pulses all over the world to enable high-speed internet

This principle is called "total internal reflection"

#optics #stem #science #physics #laser #engineering #shorts