p37_041 - B . We note that angle 6 APB is the same as , and...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
41. Consider two of the rays shown in Fig. 37-37, one just above the other. The extra distance traveled by the lower one may be found by drawing perpendiculars from where the top ray changes direction (point P ) to the incident and di±racted paths of the lower one. Where these perpendiculars intersect the lower ray’s paths are here referred to as points A and C . Where the bottom ray changes direction is point
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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....
View Full Document

Ask a homework question - tutors are online