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 [[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. | + | 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. |
Revision as of 08:40, 16 October 2014
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.
