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ERIC Number: EJ1032985
Record Type: Journal
Publication Date: 2014-Mar
Pages: 2
Abstractor: As Provided
Reference Count: 7
ISBN: N/A
ISSN: ISSN-0031-921X
Index of Refraction Measurements Using a Laser Distance Meter
Ochoa, Romulo; Fiorillo, Richard; Ochoa, Cris
Physics Teacher, v52 n3 p167-168 Mar 2014
We present a simple method to determine the refractive indices of transparent media using a laser distance meter. Indices of refraction have been obtained by measuring the speed of light in materials. Some speed of light techniques use time-of-flight measurements in which pulses are emitted by lasers and the time interval is measured for the pulse to travel from the laser to a detector. These experiments are relatively costly and use sophisticated equipment not always available in an educational institution. Our method uses a laser distance meter that can be purchased for under $80. The meter uses the accepted value of the speed of light in vacuum to determine distances based on a measured time of flight. The output is distance in meters or feet.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://scitation.aip.org/tpt
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A