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    Entries in laser (2)

    Wednesday
    Jan252017

    Interview with Dr. Jim Nelson of Willmar, MN.

    Friday
    Aug082014

    Does air attenuate laser power?

    A common misconception about lasers is that they 'lose' power going through air. This demonstration video shows that they do not. The inverse square law applies to point sources of light - not to lasers. All lasers are slightly divergent, but the beam is still collimated and all the laser power can be concentrated to a small spot.