A wave of amplitude .30 m interferes with a second wave of amplitude .20 m. What are the largest and smallest displeacements that can occur? What type of interference is demonstrated by each displacement?

Answer 1

The largest displacement possible is 0.3 + 0.2 = 0.5 (which corresponds to constructive interference). The lowest is 0.3 - 0.2 = 0.1 (which corresponds to destructive interference).