Abeam of unpolarized light in air strikes a flat piece of glass at an angle of incidence of 54.2 degrees. if the reflected beam is completely polarized, what is the index of refraction of the glass? ( show work)

a. 1.60
b. 1.39
c. 1.52
d. 2.48

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?