Attention: alien alert! đœ Who noticed it?!
[1] Next, weâll show the spectra of different lights. In front, we have LED lamps, in the middle â energy-saving lamps, and in the back, old incandescent bulbs.
The spectra â you probably remember from school: when sunlight passes through a prism, you get a rainbow. Here, we have diffraction gratings, and Iâll demonstrate this now.
[2] Iâm holding the diffraction filter in front of my smartphone camera, and you can see this funny little rainbow.
[3] On the left, you see colors from an energy-saving lamp â rarely used nowadays â and next to it, the old incandescent bulbs. The energy-saving lamps show only five colors, while the incandescent bulbs display the full spectrum.
© Video: Benjamin Winkel, MPIfR/Effelsberg @HIprocessor
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