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http://dx.doi.org/10.3807/JOSK.2008.12.3.210

Measurement of Refractive Index of Solid Medium by Critical Angle Method When Air Gap is Present  

Lim, Hwan-Hong (Department of Physics, Pusan National University)
Kwon, Moon-Soo (Department of Physics, Pusan National University)
Choi, Hee-Joo (Department of Physics, Pusan National University)
Kim, Byoung-Joo (Department of Physics, Pusan National University)
Cha, Myoung-Sik (Department of Physics, Pusan National University)
Publication Information
Journal of the Optical Society of Korea / v.12, no.3, 2008 , pp. 210-214 More about this Journal
Abstract
A critical angle method was used to measure the index of refraction of a solid medium when an air gap between the prism and the medium is present. The gap effect was analyzed both numerically and experimentally. Since the total internal reflection is severely disturbed by the large gap, determination of the critical angle and the resulting refractive index becomes ambiguous and inaccurate. By using an index matching fluid, we could determine the index of refraction with an uncertainty of ${\pm}2{\times}1^{-3}$ even when the gap is as large as 1 ${\mu}m$.
Keywords
critical angle method; refractive index; total internal reflection;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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