Title

Fresnel's Lighthouse Lenses

Document Type

Article

Publication Date

2007

Abstract

One of the rewards of walking up the scores of steps winding around the inside of the shaft of a lighthouse is turning inward and examining the glass optical system. This arrangement of prisms,lenses, and reflectors is used to project the light from a relatively small source in a beam that can be seen far at sea.

Journal

The Physics Teacher

Volume

45

First Page

550

Last Page

551