Abstract:

Deviation of light from its straight path is caused by the presence of massive objects, i.e., the presence of gravitational field according to the general theory of relativity. It is shown that the low energy effective field theory on D-branes is of Born-regulated gravity theories. In this work a Born-regulated type gravitational field is postulated. According to the space time metric in the Born-regulated gravity theory, An explicit representation of the angular deviation of light path is derived. A Born-regulated type theory of gravitational field is postulated, and an explicit representation of the angular deviation of light path is derived, Δφ≈4Mrmin-4Mrmin49k2βr6min. Clearly, the result shows that β→0 and k→0, Δφ→4Mrmin which is just the result from the Einstein’s general relativity theory.

Key words: Born-regulated gravity; deviation of light path; Einstein’s general relativity theory