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Unformatted text preview: B . We note that angle 6 APB is the same as , and angle BPC is the same as (see Fig. 3737). The dierence in path lengths between the two adjacent light rays is x =  AB  +  BC  = d sin + d sin . The condition for bright fringes to occur is therefore x = d (sin + sin ) = m where m = 0 , 1 , 2 , . If we set = 0 then this reduces to Eq. 3722....
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 Fall '08
 SPRUNGER
 Physics

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