| The simulation shown opposite shows a 2-D representation of
an Ewald sphere intersecting a reciprocal lattice. The diffraction spots
which arise from the intersection of the circle with the lattice spots are displayed on
the strip below. The curvature of the circle with respect to the reciprocal lattice,
depends on the relative values of the wavelength, and the spacing of the lattice planes in
the crystal.
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|
 Explore by changing the parameters of wavelength, l, and the
spacing of the crystal planes, d, the different situations that arise relating to the use of x-rays
and electrons. (Remember that electron beams have much smaller wavelengths than x-ray
beams.)
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The
origin of the reciprocal lattice always gives rise to a diffraction spot. Why?
