§5-8多缝夫琅和费衍射 ■P点产生的复振幅: (p)=E1(p)+E2(p)+… N项 sin a 1+ex(6)+exp(26)+…+exp(N-1) expl iN a -exp(i8) exp p exp(2 Ns sin sin exp sIn§5－8多缝夫琅和费衍射 ◼ P点产生的复振幅 ： ( ) ( ) ( ) ( ) ( )  ( )   ( )  ( ) ( )       = −              −      −              −      − = − − =         = + + + + − = + + 2 exp 1 2 sin 2 sin ~ sin 2 exp 2 exp 2 exp 2 exp 2 exp 2 exp 1 exp ~ sin 1 exp 1 exp exp 2 exp 1 ~ sin ~ ~ ~ 0 0 0 1 2                     i N N E i i i iN iN iN i iN E E i i i N E p E p E p  N    项