A short exposition on why gravity cannot be modeled as an electromagnetic phenomenon.
In light of the recent experimental results at LIGO, I thought a few words on gravitational radiation are in order. Gravitational waves are a phenomenon which occurs both in linearised gravity, as well as a solution to the full Einstein equations. They are periodic disturbances in the gravitational field, a time-varying gravitational influence; in the […]
Preparations and Tests. A preparation is an experimental procedure which is completely and exactly specified ( like a recipe ). A test starts like a preparation, but includes a final step where previously unknown information is obtained by the observer. The distinction between the two involves a direction for the flow of time, hence the […]