## College Physics (4th Edition)

If destructive interference occurs, then the amplitude will be $5~units - 3~units$ which is $2~units$ If constructive interference occurs, then the amplitude will be $5~units + 3~units$ which is $8~units$ Since these two values are the extreme points, the range of possible amplitudes is $2~units$ to $8~units$ The correct answer is: B. Between 2 units and 8 units