Question

Question: In this problem you will be considering Brewster's angle. Light travelling through a medium with refractive index ni = 1.09 is incident at an angle lº to the normal on a medium with refractive index n2 = 1.45. A n2 Figure 1. Polarised light travelling through a medium with refractive index ny is incident at an angle 0 (to the normal) on a block with refractive index n2. Part 1) What is Brewster's angle OB in this case? OB= Part 2) When unpolarized light is incident at Brewster's angle on a horizontal surface, which of the following is true in an ideal set up? Select all options that are correct. OThe refracted light is perfectly polarized OThe reflected light is perfectly polarized OThe angle between the reflected and refracted rays is 90 degrees ONo light is reflected OThe reflected light is polarized horizontally OThe reflected light is polarized vertically Part 3) Polarizing sunglasses can be used to block light reflected off water. To minimise the amount of reflected light passing through the sunglasses the polarizing strips in the sunglasses should be O(No answer given) Vertical O Horizontal

Answer 1

M₂ > ni Oi > O reforation angle beth Refpuched & Reflasch then refleted is polonised - doo tan Oo 12 Of = brewsten's angle A > OB = tan (1.45/109) = 1530 B2 Reflected light is perfectly polanized 3 Angle between Refleted & Reforacted =900 Vertical storipes & they allow vertically pelanized light to enten. Part 3