Figure P.4.91 shows a laserbeam incident on a wet piece of filter paper atop a sheet of

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Figure P.4.91 shows a laserbeam incident on a wet piece of filter paper atop a sheet of glass whose index of refraction is to be measured€”the photograph shows the resulting light pattern. Explain what is happening and derive an expression for niin terms of R and d.

Figure P.4.91

п, Laserbeam Air Glass Air

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Optics

ISBN: 978-0133977226

5th edition

Authors: Eugene Hecht

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