Product Details
Planck’s Constant
The system is an excellent illustration of modern electronics and gives a good investigation into a difficult topic in Post-16 physics.
Description
Modern LEDs (light emitting diodes) cover the range from deep blue to infra-red. By monitoring the voltage at which each LED just 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 deduced.
The system is an excellent illustration of modern electronics and gives a good investigation into a difficult topic in Post-16 physics.
The LEDs are mounted in a self-contained box with voltage control and monitoring points for current and voltage. A protection resistor is included to prevent damage to the LEDs.
Complete with viewing tube but without power supply which should be approximately 5V d.c. from any laboratory source.
https://lascells.com/product/plancks-constant/
What is Planck’s Constant and why is it significant? Dive into quantum mechanics and measure h with the Lascells Planck’s Constant apparatus – an experiment easily done within a single lesson / lab. Perfect for embedding into your teaching on photoelectricity, get confident with experiment set up, underlying theory, and data analysis with this instructional video. The S600-020E Planck’s Constant Apparatus uses different colour (wavelength) LEDs to deduce an estimate of h.
