 Starting with the   equivalence principle, Einstein deduced the phenomena of gravitational time dilation, the gravitational bending of light (albeit with the wrong value )   , and the gravitational slowing of the speed of light .
<meaning-changed>  Starting with the   equivalence principle, Einstein deduced the phenomena of gravitational time dilation, the gravitational bending of light (albeit with the wrong value )   , and the gravitational slowing of the speed of light .
 In his 1907 Jahrbuch paper, Einstein first addressed the question of whether the propagation of light is influenced by gravitation, and whether there is any effect of a gravitational field on clocks. In 1911, Einstein returned to this subject, in part because he had realized that certain predictions of his nascent theory were amenable to experimental test. equivalence principle, Einstein deduced the phenomena of gravitational time dilation, the gravitational bending of light (albeit with the wrong value ) , and the gravitational slowing of the speed of light .