By analyzing how these waves reflect, refract, or slow down as they move through the crust, mantle, and core, scientists can determine the composition and density of each layer. Until now ...

Some waves move through a substance because the particles vibrate at right angles to the direction that the wave is moving in, these types of waves are called transverse waves. Other waves travel ...

These electrons are moving back and forth. Actually, the wave displayed in the activity is a representation of the back and forth movement of electrons. If the wave has a frequency of 200,000 Hz ...