Singapore GCE A-Level H3 Physics Practice Questions - Singapore GCE A-Level H3 Physics Examination (SEAB Syllabus 9814) Exam

The speed of light in vacuum is identical in all inertial reference frames, regardless of the motion of the source or observer. The speed of light varies proportionally with the velocity of the observer relative to the emitting source. Gravitational acceleration is strictly equivalent to uniform linear acceleration in all reference frames. The laws of mechanics are identical in inertial frames, but electrodynamic laws depend on absolute rest.