Question 17 (2 points) Listen Students have four pairs of sunglasses, each with lenses where the polarization filter is oriented in different directions (indicated by the direction of the lines drawn on the lenses below). They are planning to ride rafts down a river on a sunny day where there is a lot of glare on the water. Which pair would they want to wear to eliminate the glare from the sun? (DOK 1) Pair A Pair B Pair C O They should wear pair A because it will eliminate the horizontally oriented waves that tend to cause glare. O They should wear pair B because it will eliminate the horizontally oriented waves that tend to cause glare. They should wear pair C because it will eliminate both the horizontally and vertically oriented waves. They should wear pair D because it will eliminate all light waves.Question 18 (4 points) Listen A group of students have been investigating single slit diffraction. As part of the analysis of their data, they propose different models to explain how the diffraction patterns are created. The proposed models are shown below. . Student A: Light is made up of particles that will bend around boundaries. After they bend, the light particles bounce off of each other to create bright and dark areas, like paint splatter against a canvas. . Student B: Light is a wave, but it doesn't bend. When it encounters a boundary, only the wave that can fit through the slit can go through in a line. This is why there is a bright spot in the middle. The other dimmer spots occur because of light reflecting off of the screen. . Student C: Light is a wave, that bends around boundaries. The bright and dark areas of the pattern are created by wave interference. The color of the light waves changes how they will interfere. This can be seen when using the different colors which created bright spots in different locations on the screen. . Student D: Light is a wave that bends around boundaries. The bright and dark areas of the pattern are created by wave interference. The color of light changes the interference pattern because it changes the number of light waves that can interfere. Higher frequencies make smaller amplitude waves. If the waves are smaller, more waves can travel through the slit. This is why there is a difference in the number of bright areas that make up the pattern. Which student has proposed a model for the diffraction of light that contains no incorrect statements? Student A Student B Student C Student DQuestion 19 [2 points) Listen Optics c = 3x10 m / 5 v = /A d n, sin & = n, sin ? m= m= -di This object is located 13.0 cm to the left of the lens and the image forms at 20.8 cm to the right of the lens. Calculate the focal length. 8.0 cm O 6.8 cm 7.8 cm 1.6 cm