The Lorentz factor is used ubiquitously in relativity for transformation between frames and in describing various relationships. Wikipedia describes this as: ---------- The Lorentz factor is defined as: γ = 1/√(1-v2/c2) = 1/√(1-β2) = dt/dτ where: v is the relative velocity between inertial reference frames, β is the ratio of v to the speed of light c. τ is the proper time for an observer (measuring time intervals in the observer's own frame), c is the speed of light. ---------- This is all great mathematically, and well understood in its applications in relativity. I am wondering if there is a simple and understandable explanation of what the Lorentz factor really is. I mean, is there any intuitive, physical way in which it can be explained? (for example, it is a conversion factor between such and such...) Any opinions on how we might be able to describe the 'real meaning' of the Lorentz factor in some intuitive and easily understandable way?