Can We See Past the Horizon?
Теги
physics almanacphysicsearth measurementsdistance horizonhow far horizonfermat's principleround earthlight refractiontrue horizonflat earthal birunifermatphysics coursephysics explainedatmospheric refractionopticshorizonearth radiusearth circumferenceearth sizecalculus variationseuler lagrangephysics girlsixty symbolsnumberphileveritasiumeigenchrisgeometrylight bendingspherical earthleast actionlight least time