Some more angles and refraction a little twist this time

[aliaze1]

Homework Statement

An underwater diver sees the sun 50 degrees above horizontal.

How high is the sun above the horizon to a fisherman in a boat above the diver?

Homework Equations

n΄sinθ΄ = n¹sinθ¹

or, if that is confusing,

n1sinθ1 = n2sinθ2

The Attempt at a Solution

I visualized it like this:

http://photo.ringo.com/232/232646988O877654972.jpg

http://photo.ringo.com/232/232646988O877654972.jpg

and using that, found the other angle (θ2, 'opposite' to x) as 90-50 = 40

so using the formula, i got this:

(1)sin(x) = 1.33 sin (40),
x =58.7485

computer says this is incorrect, any help? thanks

 

[learningphysics]

You didn't get x... You got the angle of incidence which is 90-x.

 

[aliaze1]

Thanks!