Speaker
Dr
William A. Tobias
(University of Virginia)
Description
Evidence of the wave nature of electrons is given by the fact that electrons can diffract. A common demonstration consists of sending a beam of electrons through a graphite target which results in a bullseye pattern on the fluorescent screen of a cathode ray tube. Due to the crystalline structure of the target, one expects the pattern to be similar to sending laser light through two orthogonally oriented diffraction gratings. Why is the electron pattern circular rather than linear? The explanation will be demonstrated by diffracting a laser beam through a rotating fine mesh screen.
Primary author
Dr
William A. Tobias
(University of Virginia)
