Angle of strongest polarization

[togahockey15]

Homework Statement

At what angle above the horizon is the Sun when light reflecting off a smooth lake is
polarized most strongly?

Homework Equations

dsin(θ) = mλ

I = E^2

The Attempt at a Solution

I think that the polarization is strongest when the angle between the light and the water is closest to or at 90 degrees, which would occur at noon. I don't have a good explanation for this, though. Can anyone help?

 

[Carid]

Check out Brewster's law.