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Determining Planck's Constant with LEDs: Investigating the Photoelectric Effect and Electronic Light Sensors Kit

Item # 754030

Grades 9–12. Take a smartphone selfie and you're using the photoelectric effect. Students establish relationships among light frequency, wavelength, and energy using LEDs while calculating Planck's constant. Investigate the wave and particle models of light as students calculate threshold voltages to turn on LEDs (photoelectric effect) and measure wavelength using a diffraction grating. The photoelectric effect and the discrete nature of quantum mechanics are addressed as well.



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