Bragg's Law: Find Equation 2dsinθ=nλ

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    Bragg's law Law
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Discussion Overview

The discussion centers around the equation 2dsinθ = nλ from Bragg's Law, exploring its applications in determining wavelengths, structural parameters, and angles in diffraction experiments.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Some participants note that the equation is typically used to determine the wavelength of x-rays by knowing the crystal lattice spacing and measuring the diffraction angle.
  • Others propose that the equation can also be utilized to derive structural parameters from a sample, such as distances between electron densities, using a known wavelength.
  • A participant mentions that it can be used to calculate angles for a given structure and wavelength, which could aid in designing an x-ray monochromator.
  • Another participant introduces an application of Bragg diffraction in determining the mass of the pi-meson by measuring atomic transition x-ray energies in pionic atoms.

Areas of Agreement / Disagreement

Participants present multiple applications of the equation, indicating a range of perspectives on its utility, but there is no consensus on a singular primary use.

Contextual Notes

Some assumptions about the context of the applications may be missing, such as specific conditions under which the equation is applied or the types of materials involved in the experiments.

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In the Bragg's Law, what is the equation 2dsinθ = nλ actually used to find?
 
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It is normally used to determine the wavelength of an x-ray by knowing the crystal lattice spacing and measuring the diffraction angle..
 
... it can also be used the other way round - i.e. to derive structural parameters from a sample, e.g. distances between electron densities (=d) using a known wavelength (=lamda).
This is used in diffraction experiments (XRD) like in crystallography or in small angle x-ray scattering (SAXS).
 
And finally, it can be used to calculate the angle(s), for a given structure and wavelength. So you can design an x-ray monochromator, for example.
 

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