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Gravitational redshift is generally reported by most of the authors withoutconsidering the influence of the energy of the test particle using variousspacetime geometries such as Schwarzschild, Reissner-Nordstrom, Kerr andKerr-Newman geometries for static, charged static, rotating and chargedrotating objects respectively. In the present work, the general expression forthe energy dependent gravitational redshift is derived for charged rotatingbody using the Kerr-Newman geometry along with the energy dependent gravity'srainbow function. It is found that the gravitational redshift is influenced bythe energy of the source or emitter. One may obtain greater correction in thevalue of gravitational redshift, using the high energy photons. Knowing thevalue of gravitational redshift from a high energy sources such as Gamma-rayBursters (GRB), one may obtain the idea of upper bounds on the dimensionlessrainbow function parameter ($\xi$). Also there may be a possibility tointroduce a new physical scale of the order of $\frac{\xi}{E_{Pl}}$.

Gravitational Redshift in Kerr-Newman Geometry Using Gravity's Rainbow