PLANCK'S CONSTANT BY LED
DescriptionExp-1 Determination of material Constant h.
Exp-2 Determination of Temperature Coefficient of Current.
Exp-3 Determination of Planck's Constant by LED method.
Principle and Working:
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 V is 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
In the present setup ,the Planck Constant is given by
Contents:
| Cat. No. | Item Name | Qty. |
| SEA95 | Planck’s constant apparatus | 1 |
| SEB06 | Oven | 1 |
| SEB09 | LED red | 1 |
| SEB10 | LED yellow | 1 |