Suppose that during any period of 1/4 second there is one instant at which the crests or troughs of component waves are exactly in phase and maximum reinforcement occurs, how many beats will occur in 1 second (a) 4 (b) 8 (c) 2 (d) 12

The correct answer for the question that is being presented above is this one: " (a) 4." Suppose that during any period of 1/4 second there is one instant at which the crests or troughs of component waves are exactly in phase and maximum reinforcement occurs, in 1 second, there will be 4 beats.