HW11_Solutions - HOMEWORK 11 SOLUTIONS Q33.7 ANSWER Because...

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HOMEWORK 11: SOLUTIONS Q33.7: ANSWER: Because of finite thickness, window has two surfaces that reflect the same original ray. 33.1. I DENTIFY : For reflection, . S ET U P : The desired path of the ray is sketched in Figure 33.1. E XECUTE : , so . and . E VALUATE : The angle of incidence is measured from the normal to the surface. Figure 33.1 33.11. I DENTIFY : Apply Snell’s law to each refraction. S ET U P : Let the light initially be in the material with refractive index and let the final slab have refractive index . In part (a) let the middle slab have refractive index . E XECUTE : (a) 1 st interface: . 2 nd interface: . Combining the two equations gives . This is the equation that would apply if the middle slab were absent. (b) For N slabs, , , …, . Combining all these equations gives . E VALUATE : The final direction of travel depends on the angle of incidence in the first slab and the refractive indices of the first and last slabs. 33.23.
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This note was uploaded on 02/11/2012 for the course PHYSICS 222 taught by Professor Ogilvie during the Fall '05 term at Iowa State.

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HW11_Solutions - HOMEWORK 11 SOLUTIONS Q33.7 ANSWER Because...

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