Final answer:
The energy of a wave increases when the amplitude of the wave is doubled, and the frequency of a wave is not directly related to its energy.
Step-by-step explanation:
The energy of a wave increases when the amplitude of the wave is doubled.
When the amplitude of a wave is doubled, the energy it carries is quadrupled. This is because the energy in a wave is directly proportional to the square of its amplitude. So, if the amplitude is doubled, the energy is increased by a factor of four.
Furthermore, the frequency of a wave is not directly related to its energy. The frequency of a wave determines the number of complete cycles it completes in a unit of time. The energy of a wave is determined by its amplitude, not its frequency.