E1 Gravitation and Orbits

This section has demonstrations of the theory of universal gravitation and its effects, including orbits and gravitational lensing.

Articles
Image	Title
	E1-01: CAVENDISH EXPERIMENT - MODEL Aid in describing the Cavendish experiment.
	E1-11: POTENTIAL WELL -MODEL Demonstrates motion of planets or satellites in an inverse square gravitational field
	E1-12: MARBLE IN GLASS BOWL Demonstrate orbits in a gravitational potential well.
	E1-21: GRAVITATIONAL LENS OPTICAL MODEL Demonstrate optical characteristics of a gravitational lens.