Destructive Interference:

Similarly, it is easy to visualize the exact destructive interference (between two planes, with a path difference of λ/2) as shown in Figure 2.10.

Figure 2.10: Schematic of destructive interference.

At a different angleθ' , the waves scattered from two successive planes interfere (nearly) destructively (see Figure 2.11).

Figure 2.11: Ray diagram to demonstrate destructive interference.