Dictionary Meaning and Definition on 'Diffraction'
n : when light passes sharp edges or goes through narrow slits
the rays are deflected and produce fringes of light and
- Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
Wikipedia Meaning and Definition on 'Diffraction'
Diffraction refers to various phenomena which occur when a wave encounters an obstacle. Italian scientist Francesco Maria Grimaldi coined the word "diffraction" and was the first to record accurate observations of the phenomenon in 1665. In classical physics, the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Similar effects occur when light waves travel through a medium with a varying refractive index or a sound wave through one with varying acoustic impedance. Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, x-rays and radio waves. As physical objects have wave-like properties (at the atomic level), diffraction also occurs with matter and can be studied according to the principles of quantum mechanics.[See more about Diffraction at Dictionary 3.0 Encyclopedia]
Words and phrases related to 'Diffraction'
Diffraction Sample Sentences in News
- A Molecular Ballet under the X-ray Laser
The molecules (green stream) enter the test chamber with random orientation and are forced to all take up the same pose by an optical laser (red). A bright X-ray flash (blue) produces a diffraction image (upper right) that contains structural information about the molecule. Read more on this news related to 'Diffraction'
- Rigaku Introduces Newest Instruments at Pittcon 2014
Rigaku will be exhibiting its latest lines of benchtop X-ray diffraction (XRD) and X-ray fluorescence (XRF) instruments along with its handheld and portable Raman spectrometers at booth #2355 at Pittcon 2014. (PRWeb February 25, 2014) Read the full story at http://www.prweb.com/releases/2014/02/prweb11613311.htm Read more on this news related to 'Diffraction'
- Superconductivity in Orbit: Scientists Find New Path to Loss-Free Electricity
Brookhaven Lab scientists and study coauthors (from left) Lijun Wu, Yimei Zhu, Chris Homes, and Weiguo Yin stand by the electron microscope used to reveal the multi-orbital distributions with a technique called quantitative convergent beam electron diffraction (CBED). Read more on this news related to 'Diffraction'