A ray of light traveling in a block of glass (n=1.52) is incident on the top surface at an angle of 57.4? with respect to the normal in the glass. If a layer of oil is placed on the top surface of the glass, the ray is totally reflected.
What is the maximum possible index of refraction of the oil?
apply snells law na \(\sin A=n b \sin B\)
where \(A\) is angle of incidence, \(B\) is angle of Refraction
na and \(\mathrm{nb}\) are refractive index
for criticla, angle \(\mathrm{B}=90\) deg
\(\mathrm{nb}=1.52 * \sin 57.4\)
\(\mathrm{nb}=1.28\) is the rerfractive index of oil layer
A ray of light traveling in a block of glass (n=1.52) is incident on the top...