Building on the analytic geometry of Rene' Descartes, these techniques allow us to reason about the infinitely small and infinitely small and infinitely large in a mathematically rigorous way. Newton also revised Descartes' theory of light to show that white light is composed of different rays, each associated with a specific angle of refraction and a specific color. Newton also invented the reflection telescope, and considered his work on light to be his first great success. The famous theory of gravitation was built on the foundation of Galileo's laws of terrestrial motion and Kepler's laws of celestial motion. Bodies continue in motion or at rest unless changed by a force.
Every action has an equal and opposite reaction.