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diffraction grating
noun
, Physics.
- a band of equidistant, parallel lines, usually more than 5000 per inch (2000 per centimeter), ruled on a glass or polished metal surface for diffracting light to produce optical spectra.
diffraction grating
noun
- a glass plate or a mirror with a large number of equidistant parallel lines or grooves on its surface. It causes diffraction of transmitted or reflected light, ultraviolet radiation, or X-rays
diffraction grating
- A polished surface, often of glass or metal, having many fine parallel stripes or slits through which radiation such as light is passed and projected onto a screen or other detection device. The interference patterns cast by the diffraction grating on the screen or detector can be analyzed to determine the frequency of the radiation.
- See also interferometer
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Word History and Origins
Origin of diffraction grating1
First recorded in 1865–70
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Example Sentences
The same method is employed to gauge the distance between the lines on a diffraction grating.
From Project Gutenberg
There are two ways open to us—one by glass prisms, and the other by a diffraction grating.
From Project Gutenberg
In some text-books it is told us that the diffraction grating gives us a dispersion which is in exact relation to the wave-length.
From Project Gutenberg
Another way of obtaining considerable dispersion is by using a diffraction grating instead of a prism.
From Project Gutenberg
The modern diffraction grating is a truly wonderful piece of work.
From Project Gutenberg
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