Review of Classical Wave

The Double Slit Experiment
• At the screen, constructive interference between the plane waves from
each slit yields a regular array of bright lines, corresponding to a high
intensity of electrons. In between each pair of bright lines, is a dark band
where the plane waves interfere destructively, i.e. the waves are out of
phase with one another.
• The spacing between the bright lines at the viewing screen is
• It is notable that the fringe pattern is independent of intensity. Thus, the
interference effect should be observed even if just a single electron is
fired at the slits at a time.
• The only conclusion is that the electron – which we are used to thinking
of as a particle - also has wave properties.