Template:Selected anniversaries/April 22

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  • 1592: Minister, scholar, astronomer, mathematician, cartographer, and scientific instrument maker Wilhelm Schickard born. He will invent machines for calculating astronomical dates and for Hebrew grammar, and contribute to the emerging field of computing machines.

    1592: Minister, scholar, astronomer, mathematician, cartographer, and scientific instrument maker Wilhelm Schickard born. He will invent machines for calculating astronomical dates and for Hebrew grammar, and contribute to the emerging field of computing machines.

  • 1904: American physicist and academic J. Robert Oppenheimer born. His achievements in physics will include the Born–Oppenheimer approximation for molecular wavefunctions, work on the theory of electrons and positrons, the Oppenheimer–Phillips process in nuclear fusion, and the first prediction of quantum tunneling.

    1904: American physicist and academic J. Robert Oppenheimer born. His achievements in physics will include the Born–Oppenheimer approximation for molecular wavefunctions, work on the theory of electrons and positrons, the Oppenheimer–Phillips process in nuclear fusion, and the first prediction of quantum tunneling.

  • 1977: Optical fiber is first used to carry live telephone traffic.

    1977: Optical fiber is first used to carry live telephone traffic.

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