Can the mind understand the world?
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Can the mind understand the world? book
The general theory of relativity eliminates this special restriction. To achieve this, however, Einstein had to even more deeply revolutionize concepts of space and time. Building on the insights of the earlier theory, he argued that space can be bent by matter. Einstein's concept of curved space is often illustrated by the rubber sheet analogy. In these imaginary situations, Einstein used his reason and intuition to investigate physics without mathematics or experiment, and at times this method made Einstein appear more like a modern philosopher than a hard-nosed physicist. Thus the rubber sheet analogy illustrates the way mass curves space, the curvature of 'straight' inertial paths and gravity waves. In the aftermath of Germany's defeat at the end of the First World War, the English astronomer Arthur Eddington organized an expedition to observe a total eclipse in South Africa. The concavity was evidence for the presence of some gravitational field pulling the water out to the sides of the bucket.