Problem 2: a drop of water with spherical form of index n is lighted by the sun, and infinite distance object. d is the total deviation of a light ray entering the drop at incidence angle i, and get refracted after n refractions inside the drop a) find dn as a function of i, rand n. b) show that for i e |0,5|, ds passes by an extremum if n2 1. what is the nature of that extremum? if d is the extremal value of ds and i, the corresponding value for i, find c) mumerically and d for n-1 and n-2, with n-1.33. d which of the two ray n-1 and n-2 is the most deviated from the find dn normal?