Final answer:
True. When the power of a wave is halved, the intensity is reduced to one-fourth its original value.
Step-by-step explanation:
True. When the power of a wave is halved, the intensity is reduced to one-fourth its original value. This is because intensity is directly proportional to the power of the wave and inversely proportional to the square of the distance from the source. So, if we move twice as far away, the intensity will decrease to one-fourth its original value.