Why Did Einstein Introduce His Cosmological Constant into the Original

question 13

Multiple Choice

Why did Einstein introduce his cosmological constant into the original field equations for general relativity?

• A) The constant was necessary to make the solutions describe an expanding universe.
• B) Experimental evidence at this time (before Hubble) suggested a static universe, and this constant was required to produce static solutions.
• C) The constant represented the acceleration of gravity near Earth's surface, and it was necessary to make the nonrelativistic limit of the solutions compatible with Newton's results.
• D) The constant represented the speed of light, and its inclusion was necessary to produce solutions that were compatible with the postulates of special relativity.

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