Difference between revisions of "Bragg's law"
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'''Bragg's law''' is an equation that predicts the angles at which one will observe coherent [[scattering]] ([[diffraction]]) from a crystal lattice. It is essentially a special-case of the more general phenomenon of scattering. The law is given by: | '''Bragg's law''' is an equation that predicts the angles at which one will observe coherent [[scattering]] ([[diffraction]]) from a crystal lattice. It is essentially a special-case of the more general phenomenon of scattering. The law is given by: | ||
:<math>n\lambda = 2d\sin\theta \,,</math> | :<math>n\lambda = 2d\sin\theta \,,</math> | ||
| − | where ''n'' is an integer, ''λ'' is the [[X-ray energy|wavelength]] of the incident wave (e.g. [[X-ray]] or [[neutron]]), ''d'' is the spacing between the planes in the atomic [[lattice]], and ''θ'' is the angle between the incident ray and the scattering planes. The sharp peak that results from the layering in a well-defined [[realspace]] [[lattice]] is thus called a [[Bragg peak]]. | + | where ''n'' is an integer, ''λ'' is the [[X-ray energy|wavelength]] of the incident wave (e.g. [[X-ray]] or [[neutron]]), ''d'' is the spacing between the planes in the atomic [[lattice]], and ''θ'' is the angle between the incident ray and the scattering planes. The sharp peak that results from the layering in a well-defined [[realspace]] [[lattice]] is thus often called a [[Bragg peak]]. |
==See Also== | ==See Also== | ||
* [http://en.wikipedia.org/wiki/Bragg%27s_law Wikipedia: Bragg's law] | * [http://en.wikipedia.org/wiki/Bragg%27s_law Wikipedia: Bragg's law] | ||
Latest revision as of 11:13, 24 January 2015
Bragg's law is an equation that predicts the angles at which one will observe coherent scattering (diffraction) from a crystal lattice. It is essentially a special-case of the more general phenomenon of scattering. The law is given by:
where n is an integer, λ is the wavelength of the incident wave (e.g. X-ray or neutron), d is the spacing between the planes in the atomic lattice, and θ is the angle between the incident ray and the scattering planes. The sharp peak that results from the layering in a well-defined realspace lattice is thus often called a Bragg peak.
