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Wave optics of the spherical gravitational lens part I: Diffraction of a plane electromagnetic wave by a large star

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Abstract

This paper gives the Poynting vector of a plane electromagnetic wave diffracted by the gravitational field of a large spherical body (large compared to its Schwarzschild radius) and shows in detail how this body works as a gravitational lens. The most interesting results are (1) an extreme amplification of intensity near to the axis of symmetry in the far field behind the body, with a factor of 10 times the Schwarzschild radius divided by the wavelength of the light, and (2) the appearance of double images, differing in shape and position from the predictions of geometrical optics.

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Herlt, E., Stephani, H. Wave optics of the spherical gravitational lens part I: Diffraction of a plane electromagnetic wave by a large star. Int J Theor Phys 15, 45–65 (1976). https://doi.org/10.1007/BF01807086

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  • DOI: https://doi.org/10.1007/BF01807086

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