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Diffraction and Interference of Plane Light Waves
Diffraction and Interference of Plane Light Waves

... Set up a projection screen by taping a piece of paper to the box on the end of the laboratory table. Mount the slide, which contains several single slits of different widths in front of the laser so that a diffraction pattern is produced on the screen. Record the patterns for the four available sing ...
Improved modeling of grid structures on optics: transmission, sheet
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... Windows and domes often require an electrically conductive coating to shield the underlying sensors from electromagnetic interference (EMI). While a very thin layer of metal can be deposited on the substrate to provide excellent conductivity, the optical transparency would be dramatically reduced. A ...
Conference title, upper and lower case, bolded, 18 point type
Conference title, upper and lower case, bolded, 18 point type

... Windows and domes often require an electrically conductive coating to shield the underlying sensors from electromagnetic interference (EMI). While a very thin layer of metal can be deposited on the substrate to provide excellent conductivity, the optical transparency would be dramatically reduced. A ...
Light - FT HELP
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The Balmer Lines of Hydrogen and Deuterium
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Physics 422 - Spring 2016 - Assignment #8, Due April... 1. Total internal reflection occurs when the angle of incidence, θ
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Physics - No Brain Too Small
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Diffraction grating



In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.For practical applications, gratings generally have ridges or rulings on their surface rather than dark lines. Such gratings can be either transmissive or reflective. Gratings which modulate the phase rather than the amplitude of the incident light are also produced, frequently using holography.The principles of diffraction gratings were discovered by James Gregory, about a year after Newton's prism experiments, initially with items such as bird feathers. The first man-made diffraction grating was made around 1785 by Philadelphia inventor David Rittenhouse, who strung hairs between two finely threaded screws. This was similar to notable German physicist Joseph von Fraunhofer's wire diffraction grating in 1821.Diffraction can create ""rainbow"" colors when illuminated by a wide spectrum (e.g., continuous) light source. The sparkling effects from the closely spaced narrow tracks on optical storage disks such as CD's or DVDs are an example, while the similar rainbow effects caused by thin layers of oil (or gasoline, etc.) on water are not caused by a grating, but rather by interference effects in reflections from the closely spaced transmissive layers (see Examples, below). A grating has parallel lines, while a CD has a spiral of finely-spaced data tracks. Diffraction colors also appear when one looks at a bright point source through a translucent fine-pitch umbrella-fabric covering. Decorative patterned plastic films based on reflective grating patches are very inexpensive, and are commonplace.
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