A slab of glass (n_glass = 1.75) rests on top of water (n_water = 1.33) as shown in Figure P24.37. Light is incident from the water onto the glass with an angle of incidence θ₁ as shown.
(a) Is it possible to have total internal reflection when the light reaches the glass–air interface?
(b) If total internal reflection at the glass–air interface is possible, find the minimum value of θ₁ at which this reflection occurs.