HS Physics Two Source interference

Two source interference constructive interference ------destructive interference ------- Free powerpoints at http://www.worldofteaching.com Two source interference Path difference = S2P – S1P = 1 wavelength = P constructive interference ------destructive interference ------- S1 S2 Two source interference Path difference for constructive interference = n  (where n is an integer)  2 0 3 constructive interference ------destructive interference ------- Two source interference Path difference for destructive interference = (where n is an integer) (n + ½)  ½ 1½  2½  constructive interference ------destructive interference ------- Free powerpoints at http://www.worldofteaching.com Two source interference The path difference is • n for constructive interference • (n + ½)  for destructive interference