- #1

- 27

- 0

**light refractions problem**

I dont even know where to start with this problem. Can someone please help me out?

As shown in Figure P22.49, a light ray is incident normal to on one face of a 30°-60°-90° block of zircon(n= 1.923) that is immersed in water.

Figure P22.49

(a) Determine the exit angle 4 of the ray.

4 = wrong check mark°

(b) A substance is dissolved in the water to increase the index of refraction. At what value of n2 does total internal reflection cease at point P?

n2 =