Experimental Tests of General Relativity

Abstract: Abstract This paper treats Einstein's theory of General Relativity (GR), in particular three of the earliest experiments testing its validity. It covers the de　ection of, and the redshift of light in a gravity eld, two new phenomena predicted by GR. The perihelion precession of the planet Mercury and how GR matches observations of it more correctly than classic physics is also covered. In addition to the three older tests above, the more modern application in the GPS system is discussed, and how it can be regarded as a test of GR. Some theoretical questions are also discussed, including comparing classic physics to GR and the classical limit of GR.