Double-slit experiment,Photo 2 of 3. Interference pattern observed in a modern-day replica of Thomas Young's double-slit experiment. A coherent beam from a Helium-Neon laser is incident on two closely-spaced 25-micron-wide slits and the resulting diffraction pattern is observed at some distance away. In this series the camera to the double-slit distance is fixed. Photo 1 and Photo 2 use two different Helium-Neon lasers,red (632.8 nm) and green (543.4 nm),illuminating the same double-slit (75 micron slit separation). Note the fringe spacing is smaller for shorter (green) wavelength. Photo 3 uses the same red laser as Photo 1,but the separation between the individual slits is smaller (58 micron). Note the increased fringe spacing in Photo 3 compared to | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 5058 px × 3378 px |
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