New Method for the Detection of Light Deflection by Solar Gravity

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Science  18 Aug 1967:
Vol. 157, Issue 3790, pp. 806-808
DOI: 10.1126/science.157.3790.806


The prediction of Einstein's theory of general relativity that light will be deflected by the sun may be tested by sending radio waves from the earth to Venus or Mercury when either passes behind the sun and detecting the echoes with a radar interferometer.