Bragg's Law
Condition for constructive interference in X-ray diffraction from crystal planes. Used to determine crystal structures and to create X-ray spectrometers.
Variables
Derivation
Path difference between rays reflecting from adjacent planes must equal whole wavelengths.
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Common questions
What is the Bragg's Law formula?
Bragg's Law is written 2dsinθ= nλ. Condition for constructive interference in X-ray diffraction from crystal planes. Used to determine crystal structures and to create X-ray spectrometers. It belongs to Modern Physics, under Quantum Mechanics.
What are the units in 2dsinθ= nλ?
In SI units, d is lattice spacing, measured in m; \theta is angle of incidence/reflection, measured in °; n is order of diffraction (1, 2, 3...) (dimensionless); \lambda is wavelength, measured in m.
How is the Bragg's Law formula derived?
Path difference between rays reflecting from adjacent planes must equal whole wavelengths. The result is 2dsinθ= nλ.