plz help in ttese 2 questions asap

2) [3D] A polarizer is used to produce linearly polarized light travelling along the 2 axis with the electric eld swinging in the if: direction. a) [10] When the electric eld vector points in the +5: direction, which way does the magnetic eld vector point? Draw a coordinate System illustrating the situation. b) [10]A second polarizer is now inserted after the rst with its polarization direction along (52-137) /\\/. Given that the amplitude of the electric eld after the rst polarizer is ED, how big is the amplitude after the second polarizer? c) [10] What is the polarization direction of the wave after the second polarizer? 3) [30] According to Snell's law light is refracted when passing from one medium (index of refraction n1) into another with index n2. a) [10] Show two cases of how refracted wave fronts travel: in one case m > n2, while in the other case n2 > 5%. Draw for both separate cases the interface of the regions, indicate where 111 and n2 apply, an incident beam, and refracted beam, as well as the normal to the interface where the incident beam hits it. Show arrows on the beams for the direction of light travel, and mark the angles. b) [10] Explain in one-two sentences and using a sketch the meaning of total internal reection and state an application. c) [10] What do we mean by dispersion of light? Explain the phenomenon, and state an application