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Physical Review D
We discuss the propagation of electromagnetic (EM) waves in the post-Newtonian approximation of the general theory of relativity. We consider diffraction of EM waves in the static gravitational field of a massive monopole. We develop a wave-theoretical description of the solar gravitational lens (SGL) and show that with its enormous magnifying power of ∼ 10^11 (for λ=1 μm) and angular resolution of ≲ 10^-10 arcsec, the SGL may be used for direct megapixel imaging of an exoplanet.doi:10.1103/physrevd.95.084041 fatcat:ambvkr42ozgf3jbydz7nmh2eni