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Everyone has seen them, lasers, and have probably teased many cats with them. Just how do those little devices manage to put out this nice beam of light? Lasers are ubiquitous not only in scientific research but also industry – knowing why this is and how they work is the motivation behind discussing it.

This video is a complete guide to how a laser works.

#laser
#education
#physics

Music: http://www.bensound.com/royaltyfree...