- Hubeňák J.: LEDs and Lasers, Fair 5, Praha 2000
Measurement of electromotive force of diodes when being illuminated by an overhead projector and a laser, both with theoretical justification of results.
- Hubeňák J.: Measurement of the magnetic field, Fair 9, Brno 2004
Measurement of a magnetic induction using a Hall effect sensor acquired from 5.25" CD-ROM.
- Hubeňák J.: Modern Photometry – Using a Phototransistor And a Multimeter, Fair 8, České Budějovice 2003
A guide on how to make a simple probe for measuring light intensity using a phototransistor. Procedure for measuring the angular dependence of light bulb and LED light intensity (the outcomes are plotted in polar graphs) and a calculation of a quantum efficiency of LED. Making of a polarizing filter from a mobile phone display, a measurement of light bulb and LED light polarization.
- Hubeňák J.: Superbright LED, Fair 11, Olomouc 2006
In this contribution you learn more about LED and the opportunities in experimenting and research.
- Hubeňák J.: Technical sprays in physics education, Fair 15, Praha 2010
Sprays can be used to liven up elementary or high school physics lesson. Electronic technical sprays are easily obtainable and include some types interesting for physics: cooling sprays and sprays for dusting off. Criminologists-technicians use, among other, sprays with magnetic particles. These sprays can be also obtained and used for experimentation.