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**8. A fly is 10 cm above the surface of a pond. How high above the water does the fly appear to a fish directly below (n**

_{air}= 1, n_{water}= 1.333)?(A) 10 cm

(B) 7.5 cm

(C) 13.3 cm

(D) 12.5 cm

(E) fish cannot see the fly because the light is totally reflected

The answer is supposed to be C but how did they figure this out?

They gave me height (h = 10 cm), but I have no angles of refraction, no just the index of refractions. But I have no formula to solve for HEIGHT because I can't use Snell's Law Equation. This makes no sense :(

**9. What angle of incidence in degrees is sunlight 100% polarized when reflecting from the surface of the pond in the previous question?**

(A) 0º

(B) 53º

(C) 37º

(D) 45º

(E) there is no angle

The answer is B, but how?

Is there a formula to use for them that I don't know about...

I've tried SNell's law but I'm not given enough variables.