Prediction of R + R2 gravity for the deflection of a photon passing close to the Sun
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Abstract
The cross-section for the scattering of a photon by the Sun's gravitational field, treated as an external field, is computed in the framework of R + R2 gravity. Using this result, we found that for a photon just grazing the Sun's surface the deflection is 1.75″, which is exactly the same as that given by Einstein's theory. An explanation for this pseudo-paradox is provided.
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English
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Nuovo Cimento della Societa Italiana di Fisica B, v. 114, n. 5, p. 595-600, 1999.
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