What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333.

32.04o

45.00o

59.99o

33.76o

Question

What is the angle of refraction of a light ray that enters the surface of a calm lake from air at an angle of 45o to the normal? The refractive index of water is 1.333.
 	
	
32.04o
	
45.00o
	
59.99o
	
33.76o

anonymous · Answer

You use snells law in this problem

$$n _{1} Sin \theta _{1} = n _{2}\sin \theta _{2}$$

anonymous · Answer

refractive index of air should be ridiculously close to 1. So you would have 
1 * sin(45) = 1.333 * sin(theta)

solve for theta