What two effects of waves that show waves carry energy?
Photoelectric effect- light waves give electrons energy, making them move (thus giving them kinetic energy), create a difference in potential, and will power a solar cell to provide electricity to houses. Since energy cannot be created or destroyed, the new kinetic energy of the electron had to come from somewhere-the light waves. This is proof that the light waves, or electromagnetic waves, have energy, because they seemingly create kinetic energy in the form of movement when they are in fact transferring their energy to another medium. Another effect is simply a waves effect on other things. For example, a water wave causes a surfer to move, but the surfer could not just have gained that kinetic energy out of thin air. It had to come from the water wave, meaning that it carried energy. Waves are, by definition, just a way of carrying energy. Waves do not look like anything. If I punch a wall and it shakes the house, then I have just created a wave. I have transferred my kinetic energ
