Measuring Plank constant with colour LEDs and compact disk

TL;DR

This paper describes an experiment to measure Planck's constant using simple, accessible materials like colour LEDs and a compact disc, demonstrating a practical approach to fundamental physics measurement.

Contribution

It presents a straightforward experimental method for measuring Planck's constant with common household items, making quantum physics more accessible.

Findings

Successful measurement of Planck's constant

Demonstration of photon energy quantization

Accessible educational experiment

Abstract

This problem was given on the Open Experimental Physics Olympiad (OEPO) "The day of the photon" on 25 April 2015. The Olympiad was a part of the celebration of the International Year of Light (IYL) http://www.light2015.org/Home/Event-Programme/2015/Competition/Bulgaria-Second-Experimental-Physics-Olympiad--25-April-2015-in-Sofia.-The-Day-of-the-Photon-in-the-International-Year-of-the-Light.html and was organized by the Sofia Branch of the Union of Physicist in Bulgaria and the Regional Society of Physicists of Strumica, Macedonia.