Analytical Solution to FRW Metric with Variable Speed of Light

<p>According to the principle of general covariance, laws physics are same in all reference frames. The controversial theory Varying Speed Light (VSL) contradicts covariance. Fortunately VLS explains some crucial issues cosmology such as Lorentz variance, biometric theories, locally cosmological constant problem, horizon<em> </em>and flatness<em> </em>problems. Also, recent astronomical observations from quasar show that fine structural depends on redshift and therefore, varies with time. In other harness this fascinating published knowledge, two models where used work. 1. Cosmology variables c; here Friedmann-Robertson-Walker (FRW) is Einstein field equation variable c Λ terms obtain scale factor, which shows continuous exponential expansion universe. 2. Variation speed light a function factor universe; we obtained: good approximation estimate current age universe its content given by state parameter ω. We obtained deceleration Hubble parameter. arrived at conclusion was decelerating ω = 1, accelerating 1/3 diverges beginning end universe.</p>