• Plancks Constant Determination Box

  • 261-030
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  • £84.51excluding VAT

    £101.41 including VAT

  • Plancks Constant Determination Box
    This apparatus is designed to determine the approximate
    value of Planck's Constant using the elbow voltage in
    the characteristics curves of a number of LEDs. There are
    seven LEDs covering from deep blue at 470 nm to near
    IR 940 nm mounted on the box with sockets for voltage
    and current measurements. By monitoring the voltage at
    which each LED begins to emit light a graph of energy
    input as a function of light emitted frequency can be
    plotted and an approximate value of Planck's Constant
    can be deduced. External 9V power source or 9V battery
    and connecting leads required.

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