Using a linear approximation for single‐surface refraction to explain some virtual image phenomena
作者:
Igal Galili,
Fred Goldberg,
期刊:
American Journal of Physics
(AIP Available online 1996)
卷期:
Volume 64,
issue 3
页码: 256-264
ISSN:0002-9505
年代: 1996
DOI:10.1119/1.18213
出版商: American Association of Physics Teachers
关键词: ANGULAR MOMENTUM;CONSERVATION LAWS;EDUCATIONAL TOOLS;ENERGY;GRAVITATION;ORBITS;RUTHERFORD SCATTERING;TWO−BODY PROBLEM;42.
数据来源: AIP
摘要:
There are many examples of interesting optical phenomena involving virtual images arising from refraction at the interface(s) between air and some transparent solid or liquid. However, because it is cumbersome to interpret analytical expressions or to sketch diagrams using Snell’s law of refraction, students rarely explore and develop a qualitative understanding of these phenomena. In this paper we introduce a simple‐to‐use linear approximation for single‐surface refraction and show how it leads to qualitatively correct descriptions of some interesting but complex optical phenomena. In particular, we analyze the virtual images formed when looking at objects through both rectangular blocks and triangular prisms. The refraction images observed through a triangular prism are particularly interesting pedagogically and also provide a physical means to distinguish between objects located just outside and just inside, or on, the prism’s surface.
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