|Voltage Range||0-4 V|
|Power Supply||12 VAC power pack|
|MicroLab Input||CAT-5 Input A, B or C|
Our Energy of Light Module, Model 214, uses the bandgap energy of light emitting diodes to demonstrate the energy and color of light. Students select an LED then increase the voltage until enough energy is supplied to initiate emission of light. The applied energy forces electrons to jump the energy gap between the N (electron excess) and P (electron deficient) semi-conductor layers. Students can explore, in a hands-on experiment, the relationship between energy, frequency and color. A plot of the voltage required to turn the LED on versus wavelength will give a slope corresponding to Plank’s Constant.
MicroLab’s Atoms First Package includes the Energy of Light Module (Model 214) and the Visual Spectrometer (Model 141), and gives students the opportunity to explore spectra, atomic structure and atomic models—content not well supported by traditional “wet-lab” topics. Because much of the time in these experiments involves computer analysis of data, two sets of students can share one set of data acquisition equipment.