p36_036 - 36. Let the thicknesses (which appear in Fig....

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Unformatted text preview: 36. Let the thicknesses (which appear in Fig. 36-31 as different heights h) of the structure be h = kL, where k is a pure number. In section (b), for example, k = 2. Using Eq. 36-34, the condition for constructive interference becomes (m + 1/2)λ where m = 0, 1, 2, . . . 2h = 2(kL) = n2 which leads to k= (m + 1/2)λ (m + 1/2)(600 nm) 2m + 1 = = , 3 nm) 2 n2 L 2(1.50)(4.00 × 10 40 or 40k − 1 = 2m. This means that 40k − 1 would have to be an even integer. One can check that none of 1 the given values of k (1, 2, 1 , 3, 10 ) will satisfy this condition. Therefore, none of the sections provides 2 the right thickness for constructive interference. ...
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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