The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

To identify the different parts of a wave. To be able to understand the different graphs used for waves. A transverse wave is one in which the vibrations of the particles are perpendicular (at right ...

For decades, physicists searched in vain for evidence of gravitational waves, the stretches and squeezes in spacetime that were first predicted by Albert Einstein’s theory of general relativity a ...