by sachi
Tags: polarisation
sachi is offline
Apr3-06, 08:53 AM
P: 76
"by what factor may the glare off water be reduced when the sun is at

a) 45 degrees above the horizon
b)60 degrees above the horizon

n.b refractive index of water is 1.33"

I have derived the fresnel reflection coefficients for the cases when E is perpendicular to the plane of incidence, and when E is parallel to the plane of incidence. I am also assuming that "glare" is caused by the E-field. But I'm not sure which reflection coeffient to use i.e do we assume that E is parallel to plane of incidence of perp.?

Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
Meir Achuz
Meir Achuz is offline
Apr3-06, 10:01 AM
Sci Advisor
HW Helper
P: 1,933
The E field from the blue sky is predominantly horizontally polarized.
This is because the Rayleigh scattering polarizes the scattered radiation.
The horizontal polarization comes out to be
You will have to use both E polarizations at the water surface.
The above factor gives the polarized horizontal E^2. Then you have to include both E polarizations with E^2 = one half of the unpolarized component.

Register to reply

Related Discussions
sigma polarisation General Physics 4
polarisation Introductory Physics Homework 3
Polarisation of light Introductory Physics Homework 2
Polarisation of light.... General Physics 3
polarisation of light! help please! General Physics 2