Question
Suppose you have an unknown clear substance immersed in water, and you wish to identify it by finding its index of refraction. You arrange to have a beam of light enter it at an angle of $45.0^\circ$, and you observe the angle of refraction to be $40.3^\circ$. What is the index of refraction of the substance and its likely identity?
$1.45$
This is fused quartz.
Solution Video