ASTRON 2B03 Lecture Notes - Lecture 1: British Home Stores, Gravitational Lens, Extra Dimensions
10 Apr 2018
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Astronomy 2b03 final spacetime and gravity - seen when light passes close by something much more massive: can make it big enough to see by: increasing ight path, gravitational eld strength. To be measurable, star must be very close to the same direction as the sun. Light from a distant star passes close to the sun and its path is. Looking back from earth, we think the star is not in it"s usual: expeditions were organized from brazil to africa in 1919 to make measurements during a solar eclipse, results were in agreement w/ Einstein"s prediction o in his 1919 test of the general theory of relativity, Eddington measured the location of stars (marked w/ lines) during a solar eclipse and detected precisely the shift predicted by gravitational redshift, his measurements may not be precise. Equivalence principle predicts that light bends in a gravitational eld.
