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Cake day: June 7th, 2023

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  • I didn’t watch the video, but this is a classic lab experiment we do for high school students. A variable resistor to adjust to threshold voltage (just before the led lights up), a multimeter to find said voltage, and knowing the wavelength of the led, voila, you get quite a surprisingly accurate Planck constant within the same order of magnitude, and even within the first digit ‘6’. It surprises our students immensely.