School of Physics Lecture Demonstration Manual

Ob-1 Matching Refractive Indices

Published: Wednesday 15 March 2006 - Updated: Monday 28 March 2011


To demonstrate that there is no reflection or change in refractive angle at a "boundary" where the refractive indices are equal.



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Matching Refractive Indices Pic


Matching Refractive Index


A small Pyrex beaker is placed inside a larger Beaker and Baby Oil is poured into the smaller beaker till the oil overflows into the larger beaker. The oil has a refractive index equal in value to the refractive index of the Pyrex glass. It is seen that the close matching of the refractive indices make the smaller beaker practically invisible.

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