Tesla Notes 09: The Oscillating Spark and Lord Kelvin's Formula
A jar of glass and a loop of copper swing a million times a second of their own accord. I derive why, count the swings in a turning mirror, and weigh the thief in the spark.
Tesla derives f = 1/(2π√(LC)) and the damping of a Leyden-jar discharge, counts the swings in a turning mirror, and finds the spark's loss.
Nikola Tesla
November 5, 2026
30 min