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Special Relativity

• What is the special theory of relativity?

General Relativity

• What is the general theory of relativity?
• According to general relativity, what causes gravitational forces?
• According to general relativity, what causes spacetime to be curved?
• According to Einstein's theory, what effect does the curvature of spacetime have?
• Is light attracted by gravity?
• What evidence do we have that light is attracted by gravity?
• What is a singularity?
• What are gravitational waves?
• Have gravitational waves been detected?