Contrast
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Contrast in the electron image can arise from both "amplitude" and "phase" effects. Amplitude contrast is produced by the loss of amplitude (i.e. electrons) from the beam; Phase contrast originates fromshifts in the relative phases of the portions of the beam which contribute to the image.
The terms "amplitude" and "phase" contrast can be somewhat misleading. More appropriate terms could have been scattering contrast and interference contrast instead of amplitude and phase contrast.
