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A spark that is a signal
Lumen · High school
Lodge: a spark starts a wave. No wire, it still spreads. A coherer feels the jerk. Forty yards, then a quadrangle. Lodge, not Hertz.
Student age
10years · 5th grade
Lumen · High school
Lodge: a spark starts a wave. No wire, it still spreads. A coherer feels the jerk. Forty yards, then a quadrangle. Lodge, not Hertz.
Student age
10years · 5th grade