For 10 points, identify this theory wherein one may change frames using Lorentz transformations to calculate length contraction, which suggests that observations of motion depend on the frame in which they are measured as proposed by Einstein.
The Klein-Gordon equation is an extension of the Schrodinger equation incorporating this theory, calculations of which are simplified in Minkowski space. One of its consequences is the pole vaulter's paradox, where a running vaulter can fit a pole entirely within a barn smaller than the pole, and another considers that a man moving in a space ship will age more slowly than his twin at rest. For 10 points, identify this theory wherein one may change frames using Lorentz transformations to calculate length contraction, which suggests that observations of motion depend on the frame in which they are measured as proposed by Einstein.
The Klein-Gordon equation is an extension of the Schrodinger equation incorporating this theory, calculations of which are simplified in Minkowski space.
{special relativity} [prompt on {relativity}; do not accept “{general relativity}”]