The Doppler Shift describes how light and sound waves are alerted based upon motion to/from an observer. This is most typically observed with sound waves through their higher pitch when approaching and lower pitch when moving away. This technology is also used in Meteorology in weather RADAR.

## Newton’s Laws

Book Philosophiæ Naturalis Principia Mathematica ("Mathematical Principles of Natural Philosophy") laid the foundations for classical mechanics. It mathematically described the observations of Copernicus, Kepler and Galileo, the three laws of motion, and the universal...