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ERIC Number: EJ956440
Record Type: Journal
Publication Date: 2011-Nov
Pages: 3
Abstractor: As Provided
Reference Count: 3
ISSN: ISSN-0031-9120
Demonstrating Fermat's Principle in Optics
Paleiov, Orr; Pupko, Ofir; Lipson, S. G.
Physics Education, v46 n6 p702-704 Nov 2011
We demonstrate Fermat's principle in optics by a simple experiment using reflection from an arbitrarily shaped one-dimensional reflector. We investigated a range of possible light paths from a lamp to a fixed slit by reflection in a curved reflector and showed by direct measurement that the paths along which light is concentrated have either maximum or minimum geometrical lengths. (Contains 6 figures and 1 table.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A