Shapiro delay
Also: gravitational time delay. In general relativity, not only are light rays deflected, in addition gravity can lead to light taking more time in its travels through space than in classical physics. This is called Shapiro effect of Shapiro ...
second
In the International System of units: the basic unit of time. Defined as a certain multiple of the oscillation period of electromagnetic radiation set free in a certain transition within the electron shell of atoms of the type ...
Schwarzschild radius
A measure for the size of a spherically symmetric black hole. It is defined using the area of the black hole's horizon: In usual high school geometry (the geometry of flat space), radius and area of a spherical surface are related as area = 4 times pi times ...
Schwarzschild black hole
A solution of Einstein's equations found by Karl Schwarzschild in 1916, which corresponds to a model universe that contains a single, spherically symmetric black hole. More precisely, the Schwarzschild solution is a whole family of solutions: ...
Ricci singularity
A type of spacetime singularity (i.e. a boundary of spacetime) that is associated with infinitely high energy density. More information about the different types of singularities can be found in the spotlight text Spacetime singularities. ...
