grating
(noun)
Any regularly spaced collection of essentially identical, parallel, elongated elements.
Examples of grating in the following topics:
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Diffraction Gratings: X-Ray, Grating, Reflection
- 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.
- A photographic slide with a fine pattern of purple lines forms a complex grating.
- For practical applications, gratings generally have ridges or rulings on their surface rather than dark lines.
- Such gratings can be either transmissive or reflective.
- An opal is another example of diffraction grating that reflects the light into different colors.
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The Spectrometer
- The instrument produces lines, much like those produced from diffraction grating as covered in a previous atom, and then measures the wavelengths and intensities of those lines.
- The source is placed in front of a mirror, which reflects the light emitted from that object onto a diffraction grating.
- This grating then disperses the emitted light to anther mirror which spreads the different resultant wavelengths and reflects them onto a detector which records the findings.
- They use a diffraction grating, movable slit, and a photodetector.
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Diffraction
- A good example would be diffraction gratings.
- For example, the closely spaced tracks on a CD or DVD act as a diffraction grating to form the familiar rainbow pattern seen when looking at a disk.
- This principle can be extended to engineer a grating with a structure such that it will produce any diffraction pattern desired, like the hologram on a credit card.
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Diffraction Revisited
- The periodic structure of a crystalline solid acts as a diffraction grating, scattering the electrons in a predictable manner.