@physicsfun 2022-11-26 20:28:32
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Fluorescein v. Laser Frequency: exploring how this famous fluorescent dye reacts to three frequencies of laser pointer using this unique liquid filled paperweight. Under Green (532 nm) we see some mild yellow fluorescence as the beam transmits through the liquid, under Red (635 nm) the beam transmits with no reaction, but under near UV Blue (450 nm) the beam is completely absorbed near the liquid surface and re-emitted in bright green with a peak at 515nm. A fun home experiment to explore quantum physics phenomena with inexpensive apparatus. Swipe to see under contrast enhanced lighting. ➡️ Follow the link in my profile for info on where to get fluorescein dye, some inexpensive lasers, and many other amazing items featured here on

@physicsfun at 2022-11-26 20:28:32

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