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Diffraction on circular aperture

Diffraction on circular aperture

C036/3519

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Credit

GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY

Caption

Diffraction on circular aperture. A setup demonstrating a classic case of Frounhofer diffraction on a circular aperture. Here of a diode laser beam (635 nm) is incident on a small aperture (diaphragm, pinhole) of 35 micron diameter. The resulting diffraction pattern (called Airy disk) is observed on a screen about 15 cm away. Insert shows a close-up of the diffraction pattern, taken in a separate shot. This is a classic demonstration of the wave nature of the light.

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