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We offer a concise and direct way to derive the bending angle of light (i.e.as generally called, gravitational lensing), while light grazes a star, throughthe approach suggested earlier by the first author, which is fundamentallybased on the energy conservation law and the weak equivalence principle. Wecome out with the same result as that of the general theory of relativity(GTR), although the philosophies behind are totally different from each other.We emphasize that in our approach, there is no need to draw a distinctionbetween light and ordinary matter, which makes our approach of gravitypotentially compatible with quantum mechanics. Furthermore, our equation thatfurnishes gravitational lensing, also furnishes the result about the precessionof the perihelion of a planet. The results obtained are discussed.

Bending of light caused by gravitation: the same result via totally different philosophies