23_InstSolManual_PDF_Part17

23_InstSolManual_PDF_Part17 - Electromagnetic Waves 23-17...

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23.63. Set Up: The polarizing angle is given by When Solve: gives and and Reflect: The critical angle and the polarizing angle both depend on the ratio of the refractive indexes of the two materials. 23.64. Set Up: The reflected beam is completely polarized when with Solve: (a) gives (b) with gives and Note that 23.65. Set Up: The reflected beam is completely polarized when with is measured relative to the normal to the surface. Solve: (a) and The sunlight is incident at an angle of above the horizontal. (b) Figure 23.38 in Section 23.10 shows that the plane of the electric field vector in the reflected light is horizontal. Reflect: To reduce the glare (intensity of reflected light), sunglasses with polarizing filters should have the filter axis vertical. 23.66. Set Up: At the earth the power radiated by the sun is spread over an area of where is the distance from the earth to the sun. Solve: (a) (b) 23.67. Set Up: The wave speed in air is For a totally absorbing surface the radiation pressure is Solve: (a) (b) (c) (d) Reflect:
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