laser eye surgery physicians

4. Twenty-seven (27) milliwatt laser used in surgery. An inexperienced doctor inadvertently dir?

4.A twenty-seven) LASER milliwatts 27 ( be used in surgery. An inexperienced doctor inadvertently directs the laser toward a nearby wall is 4.1 meters. If the diameter emerging beam is 1.1 cm, the beam divergence of 1.3 milliradians, which is the diameter of the beam in the wall (and hopefully not in an unprotected eye)?

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