When Did Einstein Originally Introduce His Theory of General Relativity

question 192

Multiple Choice

When did Einstein originally introduce his theory of general relativity, including the cosmological constant?

• A) in 1896, before the modern stellar spectral classification scheme was devised
• B) in 1915, before the question of the nature of the Milky Way Galaxy had been resolved
• C) in 1930, after Hubble had discovered evidence for the expanding universe
• D) in 1968, after the discovery of the cosmic microwave background gave evidence of the Big Bang

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