PowerPoint Presentation

Frank L. H. Wolfs

Department of Physics and Astronomy, University of Rochester, Slide 15

Einstein's Theories:
The photoelectric effect.

•Experiments showed that light can liberate electrons from a material (the photoelectrons).

•The following surprising observations were made:

•No electrons are liberated if the wavelength of the light is larger than some critical value (independent of the intensity of the light).

•The maximum energy of the electrons liberated does not depend on the intensity of the light. It only depends on the wavelength of the incident light.

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http://hyperphysics.phy-astr.gsu.edu/hbase/mod1.html

http://www.mhhe.com/physsci/astronomy/fix/student/chapter6/06f07.html