
Pickup available at Glen Innes Post Office
Usually ready in 24 hours
Quantum Physics ~ IEC Planck's Constant LED Kit
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Glen Innes Post Office
Pickup available, usually ready in 24 hours319 Grey St
PO BOX 447
Glen Innes NSW 2370
Australia+61401827758
A LOW COST METHOD OF DETERMINING PLANCK'S CONSTANT.
To determine Planck's Constant, it is necessary to measure the energy level of the photons of light of different wavelengths (or colours). Traditionally, this involves a 'photo tube' and the energy levels of electrons are measured.
In this instrument, voltage is applied to each of 7 LEDs to cause each to just conduct. The value of the voltage to begin current to flow relates to the energy of the photon of that wavelength.
7 readings, including 2x Infra Red, are taken and the graph is then plotted as normal to determine Planck's Constant. The method is not as fundamental as using a 'photo tube' but the results are good and price is much lower.