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Planck's Constant By LED

Planck's Constant By LED

Product Details:

  • Dimension(L*W*H) 220V, 50Hz AC Centimeter (cm)
  • Application Lab Equipment
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Price And Quantity

Product Specifications

  • Lab Equipment
  • 220V, 50Hz AC Centimeter (cm)

Product Description


The photon energy by Einstein equation E=hv is equal to energy gap Eg between the valence and conduction bands. The energy Eg is equal to the energy barrier eV0, that electron have to overcome in going from n-doped side of diode junction to p-doped side when no external voltage Vis applied to the diode.

In the p-doped side, electron recombine with holes releasing the energy Eg in the form of photon is given by equation

Eg = eV0


  • Determination of material Constant h.
  • Determination of Temperature Coefficient of Current.
  • Determination of Plancks Constant by LED method.


  • It is a self contained unit.
  • Using LED method instead of photocell &monochromatic light source reduces cost.
  • Built - in power supply for Oven.
  • Variable voltage source 0 - 2V DC, resolution 1mV.
  • Current meter 0-20mA / 2000mA.
  • In - built temperature sensor.


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