Template:On This Day (nonfiction)/May 1

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  • 1825: Mathematician and physicist Johann Jakob Balmer born. He will develop an empirical formula for the visible spectral lines of the hydrogen atom.

    1825: Mathematician and physicist Johann Jakob Balmer born. He will develop an empirical formula for the visible spectral lines of the hydrogen atom.

  • 1960: Cold War: U-2 incident: Francis Gary Powers, in a Lockheed U-2 spyplane, is shot down over the Soviet Union, sparking a diplomatic crisis.

    1960: Cold War: U-2 incident: Francis Gary Powers, in a Lockheed U-2 spyplane, is shot down over the Soviet Union, sparking a diplomatic crisis.

  • 1970: Electronics researcher Ralph Hartley dies. He invented the Hartley oscillator and the Hartley transform, and contributed to the foundations of information theory.

    1970: Electronics researcher Ralph Hartley dies. He invented the Hartley oscillator and the Hartley transform, and contributed to the foundations of information theory.

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