Posted by DCM on .
A spotlight on a boat is y = 2.6 m above the water, and the light strikes the water at a point that is x = 8.6 m horizontally displaced from the spotlight. The depth of the water is 4.0 m. Determine the distance d, which locates the point where the light strikes the bottom.
m

Physics 
bobpursley,
Find the angle of incidence (arctan8.6/2.6)
then use snells law to find the angle of refraction.
I am not certain if d is the distance from the boat...assuming so...
d= 8.6+4ctn(anglerefraction)
checkthat.