21 Electron and Neutron Holography
21.1 Introduction
In 1905 Einstein showed that the experimentally observed photoelectric effect could be explained by assuming that light of wavelength λ consists of particles, i.e., photons, each with energy hc/λ where h Planck’s constant and c the velocity of light.
In 1924 de Broglie proposed the converse: that all particles have wave properties and the wavelength of a particle with momentum p is given by λ = h/p. That being so, particle diffraction might be observed. Davisson and Germer, in the period 1923–1927, proved that electrons are diffracted by crystalline materials and neutron diffraction was first demonstrated in 1945.
The wavelength associated with an electron accelerated ...
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