We present a relation between incident angle and rotation angle detector in the Total Internal Reflection (TIR) experiments when using a right angle prism. In the TIR method, the light coming toward the prism will experience reflection and out of the prism at a certain angle direction. Results of analysis of the geometry and Snell’s law shows that the angular position of the detector is not only determined by the angle of incidence of light alone but also by the size of the prism and the detector position from the rotation axis of goniometer. The experimental results show relation between the angle of detector and angle of goniometer. When the prism rotated 45 °, position of goniometer detector is 2×45 °. However, when the prism rotated at an angle instead of 45 °, detector position µ is not always equal to twice the rotation angle goniometer ψ, so that this relationship needs to be corrected. This correction is also determined by the value of the refractive index of the prism is used. By knowing the relationship between detector position and the incident angle of light, this formulation can be used to control the position of the sample and the detector in the experiments based on ATR.
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16 April 2015
THE 5TH ASIAN PHYSICS SYMPOSIUM (APS 2012)
10–12 July 2012
Bandung, Indonesia
Research Article|
April 16 2015
Determination of detector rotation angle in the experiment based on the total internal reflection using an equilateral right angle prism
Hendro;
Hendro
*
1Theoretical High Energy Physics and Instrumentation Research Division, Faculty of Mathematics and Natural Sciences,
Institut Teknologi Bandung
Jalan Ganesa 10, Bandung 40132, Indonesia
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S. Viridi;
S. Viridi
2Nuclear Physics and Biophysics Research Division, Faculty of Mathematics and Natural Sciences,
Institut Teknologi Bandung
Jalan Ganesa 10, Bandung 40132, Indonesia
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Y. Pratama
Y. Pratama
3Undegraduate Student in Physics Study Program, Faculty of Mathematics and Natural Sciences,
Institut Teknologi Bandung
Jalan Ganesa 10, Bandung 40132, Indonesia
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AIP Conference Proceedings 1656, 040012 (2015)
Citation
Hendro, S. Viridi, Y. Pratama; Determination of detector rotation angle in the experiment based on the total internal reflection using an equilateral right angle prism. AIP Conference Proceedings 16 April 2015; 1656 (1): 040012. https://doi.org/10.1063/1.4917119
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