
XRay Diffraction from Atomic Planes
This applet was written as an extension to our applet showing interference from a set of diffracting sources. All atoms in a plane reradiate in phase when the angle of the emitted waves to the plane is the same as the angle of the incident waves. This condition is always satisfied in the applet, which shows how the intensity of the waves diffracted from a set of planes depends on the phase relationship between diffraction from successive planes of atoms. This is embodied in Bragg's law, that gives the angles theta when the intensity is a maximum through the condition 2dsin theta = n lambda, where n is an integer. You can see in the applet that n represents the number of wavelengths in the path difference between the radiation from successive planes and that this must be an integer at the maxima of intensities.
Hidden features
This applet was produced and written by Gary Skinner.