PHYS 202 Midterm: PHYS 202 TAMU 202s11 Exam 3
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No work needs to be shown and no partial credit will be given: a rectangular block of glass is totally immersed in water (n = 1. 33). For angles with respect to the normal less than 53. 10, some of the light is refracted into the water. What is the refractive index of the glass? (a) 2. 22 (b) 1. 66 (c) 1. 25 (d) 1. 06 (e) none of the above answers (6 pts) 2. At an instant of time and at a particular location in space, the electric field of an electromagnetic wave is in the x-direction and the magnetic field is in the +y-direction. What is the direction in which the wave is traveling? (a)+x (b) x (c) +y (d) y (e) +z (f) -z (6pts) 3. Unpolarized light with intensity j is passed through two polarizing filters. The axis of the first filter is horizontal and the axis of the second filter makes an angle of 36. 90 with respect to the horizontal.
