Interactive Java Tutorials
This tutorial explores magnification by a simple plano-convex lens when the object faces the curved surface 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.
This tutorial examines what happens to the "real" image of an object as it is moved closer to a simple plano-convex lens when the object faces the curved surface of the lens. At points greater than two times the focal length of the lens, the image of an object is real, inverted, and smaller than the object. At two times the focal length, the image is the same size as the object and is real and inverted. At less than two times the focal length, the image is real, inverted, and magnified. When the object approaches closer than the focal length of the plano-convex lens, it appears to be on the same side of the lens as the object, 25 centimeters from the eye, and it is magnified and is now a virtual image.
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.
© 1998-2013 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