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ERIC Number: EJ891977
Record Type: Journal
Publication Date: 2007-Mar
Pages: 2
Abstractor: As Provided
Reference Count: 3
ISSN: ISSN-0031-921X
Material and Optical Densities
Gluck, Paul
Physics Teacher, v45 n3 p140-141 Mar 2007
The bending of a laser beam in a medium with a density and refractive index gradient in the same direction has been described previously. When a transparent container is half filled with a salt or sugar solution and an equal amount of water is floated on top of it, then diffusion will create a concentration gradient from top to bottom. A laser light beam shone from the side of the container will then be bent gradually. Its path is shown in Fig. 1.
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: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A