杨氏双缝干涉形成明纹的条件是____A. delta = r_2 - r_1 = pm (2k-1) (lambda)/(2), k=1,2,3,...B. delta = r_2 - r_1 = pm k lambda, k=0,1,2,...C. delta = r_2 - r_1 = pm k (lambda)/(2), k=1,2,3,...D. delta = r_2 - r_1 = pm (2k-1) lambda, k=0,1,2,...

A. $\delta = r_2 - r_1 = \pm (2k-1) \frac{\lambda}{2}$, $k=1,2,3,\cdots$

B. $\delta = r_2 - r_1 = \pm k \lambda$, $k=0,1,2,\cdots$

C. $\delta = r_2 - r_1 = \pm k \frac{\lambda}{2}$, $k=1,2,3,\cdots$

D. $\delta = r_2 - r_1 = \pm (2k-1) \lambda$, $k=0,1,2,\cdots$