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ERIC Number: EJ912906
Record Type: Journal
Publication Date: 2010-Dec
Pages: 2
Abstractor: As Provided
Reference Count: 1
ISSN: ISSN-0031-921X
Determining the Thickness and Refractive Index of a Mirror
Uysal, Ahmet
Physics Teacher, v48 n9 p602-603 Dec 2010
When a laser beam reflects from a back surface glass mirror and falls on a screen, a pattern of discrete bright spots is created by partial reflection and refraction of the light at the air-glass interface and reflection at the mirror surface (Fig. 1). This paper explains how this phenomenon can be used to determine the refractive index and the thickness of the glass with a simple measurement. It is possible to utilize this experiment for geometrical optics labs and moreover it would be a nice practice for Physics Olympians.
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
Identifiers - Location: Illinois