A parallel beam of unpolarised light is incident on a plane glass surface at an angle of 58\(^{o}\) to the normal. If the reflected beam is completely polarised, calculate the refractive index of the glass.
Verified Correct Answer: .
Physical Principles & Numerical Solution
When i = 58^\circ, r = 90' - 58^\circ = 32^\circ
n = \(\frac{sin i}{sin r}\) = \(\frac{sin 58^o}{sin 32^o}\)
= 1.60
Source: Myschool Past Questions Archive (Record #53951)