A mathematical model developed by Hermann Minkowski and used by Albert Einstein in his General Theory of Relativity. Under General Relativity, spacetime consists of three non-Euclidean spatial dimensions and a Lorentzian manifold for the temporal time dimension. Under the Theory of Time, spacetime consists of four Euclidean spatial dimensions (including a Spatial-Time Dimension) and a linear temporal time dimension.

Lecture 2 – The Principle of Relativity has been added to the Home Page. This lecture discusses the historical views of the nature of the universe, the development of the Principle of Relativity, and early views of light including the Doppler Effect and redshift. This lecture provides background which helps to explain the assumptions Einstein used in his Theory of Relativity. Length: 55:59

Lecture 1 – The Romeo Effect has been added to the Home Page. This lecture discusses the Romeo Effect and identifies the issues that exist with the assumptions Einstein made in his Theory of Relativity. This lecture introduces new assumptions used in The Theory of Time. Length: 53:31

Spacetime Spacetime is a four-dimensional system that is composed of three spatial dimensions and a temporal time dimension. Einstein used the concept of spacetime in…