Interactive Java Tutorials
This tutorial explores lens action in a plano-concave lens when the object is facing the flat face of the lens. To operate the tutorial, place your mouse cursor on the soldier, then click on the left-hand button and move him back and forth to view different levels of magnification.
For the purposes of this tutorial, we apply the following equation to describe lens action:
where f is the focal length of the lens, p is the distance of the distance with respect to the optical center of the lens, and q is the distance of the image to the optical center of the lens.
The flat surface of a plano-concave lens faces the object being imaged, and this results in a negative value for the focal length. The lens equation, in this instance, yields a negative image distance resulting in the image being formed on the object side of the lens. Therefore, the soldier is formed by an extrapolation of the light rays into a virtual image formed on the incoming-light side of the lens.
Mortimer Abramowitz - Olympus America, Inc., Two Corporate Center Drive., Melville, New York, 11747.
Matthew J. Parry-Hill and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310.
Questions or comments? Send us an email.
© 1998-2019 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our