Answer the following question given this paragraph: Total internal reflection occurs when light goes from a slow (high index of refraction) medium to a fast (low index of refraction) medium. With total internal reflection, light refracts so much it actually refracts back into the first medium. This is how fiber optic cables work: no light leaves the wire. Q: When does internal reflection occur? A:
Pick from:
[i] when light goes from a slow medium to another slow medium
[ii] when light goes from a fast medium to a slow
[iii] when light goes from a fast medium to another fast medium
[iv] when light goes from a slow medium to a fast
[iv]