The 1919 measurement of the deflection of light

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eclipse_1919Clifford M. Will
The measurement of the deflection of starlight during a total solar eclipse on May 29, 1919 was the first verification of general relativity by an external team of scientists, brought Einstein and his theory to the attention of the general public, and left a legacy of experimental testing that continues today. The discovery of gravitational lenses turned Einstein’s deflection into an important tool for astronomy and cosmology. This article reviews the history of the 1919 measurement and other eclipse measurements, describes modern measurements of the effect using radio astronomy, and of its cousin, the Shapiro time delay, and discusses gravitational lenses….
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Written by physicsgg

October 1, 2014 at 12:59 pm


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  1. Not often there is a total solar eclipse in known places and 1919 is almost a century ago when astronomers achieved this big feat, proving Einstein’s General Relativity correct! Brilliant!

    Atul Gupta

    October 3, 2014 at 1:56 pm

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