ABSTRACT
This chapter describes some of the most interesting predictions of Einstein’s theory of gravity related to the motion of particles and light in a static spacetime. In 2019 the Event Horizon Telescope Collaboration obtained the first radio image of the “silhouette” of a black hole, which can be considered a further kinematical test of General Relativity and confirmed Einstein’s theory once more. The chapter discusses the classical tests of General Relativity: the redshift of spectral lines, the bending of light propagating in the gravitational field of a massive body, the precession of Mercury’s perihelion, and the Shapiro time delay, and their verification. A completely different class of tests concerns the highly-dynamical regime of the theory and the emission of radiation from non-stationary sources.
