I have just a few more questions regarding index of refractions and reflections... 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 (nair = 1, nwater = 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.