Recent content by Madysepanganahi

  1. M

    Building a half-mile long photogate and fighting diffraction

    thankyou so much! but my issue has resolved!
  2. M

    Building a half-mile long photogate and fighting diffraction

    I’ve got a laser that I want to use to measure a straight line (preferably within about a millimeter) over about 2000 ft. My first thought was to focus my laser better and bring up a card until it cut the beam completely, but focusing down to a millimeter point so far away feels pretty...