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ERIC Number: EJ912877
Record Type: Journal
Publication Date: 2010-Oct
Pages: 3
Abstractor: As Provided
Reference Count: 18
ISSN: ISSN-0031-921X
Is Magnification Consistent?
Graney, Christopher M.
Physics Teacher, v48 n7 p475-477 Oct 2010
Is the phenomenon of magnification by a converging lens inconsistent and therefore unreliable? Can a lens magnify one part of an object but not another? Physics teachers and even students familiar with basic optics would answer "no," yet many answer "yes." Numerous telescope users believe that magnification is not a reliable phenomenon in that it does not work for stars. This belief was central to the arguments of one of science's most prominent modern critics--a great story of how misunderstanding basic optics helped to yield bad ideas about science. So magnification is a great topic! It is accessible to students. It gives students insight into the workings of a familiar device such as a telescope that even frequent telescope users often lack. And it has a fascinating side story about how misunderstanding basic science led to interesting consequences.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A