Soandso
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- May 30, 2022
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@masr, - You have belatedly acknowledged it was not light, as previously asserted, but was sound "... transmissivity of the different paints...." they were "measuring." And yet, for some reason, refrain from concisely stating that the "...manner of indication ..." was in dB.They modulated the intensity of a red laser with a 1 kHz sine wave from a signal generator, shone it through a layer of paint onto a photodetector, the output of which was somehow driving a speaker. By measuring the sound output of the speaker, they obtained some manner of indication of the transmissivity of the different paints. It's a ridiculous experimental setup, and if they were my students, they'd be getting a failing grade.
I don't see why students would merit a failing grade if they generate reproducible data showing the relative pattern of sound transmissivity through colors is demonstrably similar even when alter matched levels of the pigment. Criticizing it as a "...ridiculous experimental setup..." is easy to expound, yet I am still awaiting remotely similar research being presented on this thread.
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