15_Chapter 24 HomeworkCH24 Wave Optics

15_Chapter 24 HomeworkCH24 Wave Optics - Wave Optics 24.26...

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Wave Optics 317 24.26 With a phase reversal due to reflection at each surface of the magnesium fluoride layer, there is zero net phase difference caused by reflections. The condition for destructive interference is then 11 2 22 n film tm m n λ  =+   , where 0, 1, 2, m = For minimum thickness, , and the thickness is 0 m = () ( ) 9 550 10 m 21 m9 9 . 6 n m 4 4 1.38 film n × = 8 9 . 9 6 1 0 1 = 24.27 There is a phase reversal upon reflection at each surface of the film and hence zero net phase difference due to reflections. The requirement for constructive interference in the
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This document was uploaded on 10/20/2011.

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