This paper re-examiners the principle of special theory of relativity according to Albert Einstein, which states that, “the speed of light in vacuum is the same in all inertial frames of reference”. This postulate is a misconception. If the speed of light can be reduced in certain medium, then there should be no restriction to the speed of light exceeding “c” in other medium /reference. The conceptual “time dilation” and “length contraction” are misconceptions; they are intrinsically the same classical concepts of the refraction of light. The resultant refractive index can be used to predict speed moving beyond “c”. Keywords: Time dilation ,Length Contraction, Speed of Light and Relativity