“A friend tried to make me say animal puns today but I thought they were boaring.”
Jacques BabinetBorn 5 Mar 1794; died 21 Oct 1872 at age 78.French physicist who was the first to proposed the definition of the unit of length in terms of the wavelength of a spectral line. The red line in the spectrum of cadmium was chosen, and the angstrom was redefined as a fraction of this value.. He established a principle in diffraction theory (1837) that is named after him. The Babinet compensator was his invention to measure the polarization of light.« |
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