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caption

Diffraction on a slit. A narrow slit is placed in the path of a laser beam and the resulting diffraction pattern is observed some distance away. Two different Helium-Neon lasers, red (632.8 nm) and green (543.4 nm), are used to illuminate the same slit and the camera to slit distance is fixed. Note the extent of the pattern and the fringe spacing are smaller for shorter wavelength. Also note that in both cases the central lobe is oversaturated that allows to see the outer structure more prominently. This is a classic demonstration of the wave nature of the light.

headline Photo Researchers ftp March 2011

created date 2011-03-23

credit EAST NEWS

source Science Source

byline GIPhotoStock

original transmission reference BR4479

weight 2,21MB

size 42cm x 35cm by 300dpi

keywords - Show

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