On rainy mornings or evenings when the sun is low, light reflects very well off Seattle streets. This problem explores why polarized driving glasses are effective at reducing such glare. (a) Griffiths' Eq. 9.115 gives the reflection coefficient for light polarized in the plane of incidence. Show that the reflection coefficient for light polarized perpendicular to the plane of incidence is R. = (? (b) Consider unpolarized light from the evening sun incident on wet pavement at an angle of 60°. The light reflects off the water's surface (nwer/nar = 1.3, Mwater air). Find the fraction of the reflected intensity polarized perpendicular to the plane of incidence. Which orientation of polarization should driving glasses filter out in order to minimize the glare that reaches a driver's eyes? = 28+ (The cosines are there because I am talking about the average power per unit area of interface, and the interface is at an angle to the wave front.) The reflection and transmission coefficients for waves polarized parallel to the plane of incidence are IR Eor R= *) =(a+b) (9.115)