Isotropic photon drag: Analytic expressions for velocity (3D) and position (1D) with applications to blackbody friction

摘要: The motion of objects traveling at relativistic speeds and subject only to isotropic photon drag (blackbody friction as a special case) is modeled. are assumed be perfectly absorbing. Analytic expressions for velocity position function time obtained the case in which photons constrained one-dimensional motion. If object also perfect emitter energy, analytic found body motion, full three-dimensional background. derivations carried out entirely from point view reference frame rest relative field, so that no changes involved. results model do not agree with work by previous authors, this discrepancy discussed. suitable use undergraduate classroom. Example cases light sail micron-sized sand grain examined interactions cosmic background radiation, assuming temperature 3000 K, universe became transparent, it would decay on scale years.