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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. 37-37). 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. 37-22....
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- Fall '08