The web page
'What is Relativity?' introduces non-scientists to the fascinating topic of
Einstein's Theory of Relativity. The page links to various articles for the laymen, some more
technical stuff for the technically minded and even a full-blown eBook on
Relativity and cosmology, titled '
Relativity 4 Engineers'.
The non-technical links include:
The
principles of special relativity
The principles of general relativity (What is Gravity?)
The principles of
cosmology (What is Cosmology?)
Various other articles, like the popular 'paradoxes' of relativity
The technical links include pages with free downloads explaining relativity and cosmology in easy, understandable text and mathematics. The main topics are:
Inertial movement in free space
Linear acceleration in free space
Gravity as curved spacetime
Orbits in curved spacetime
Gravitational waves
Cosmological principles
Friedmann's
Cosmological equation
Cosmic inflation
In the eBook
'Relativity 4 Engineers' the full set of equations for relativistic
Gravity and the resulting orbits are discussed in a
comprehensible way, with an appendix for the more mathematically minded.
Despite the web site's main title (Relativity 4 Engineers), it's got a lot of very comprehensible information, ranging from the 'popular' to the 'light-technical' side. Generally a very good read.
More abstracts about the What is Relativity?