Lesson presentation. IB physics first exams 2025, syllabus section A5 in pdf, ppt & odp format. 106 slides. Galilean relativity & transformations, postulates of special relativity & Lorentz transforms, relativistic velocity addition, space-time interval, time dilation, length contraction, space-time diagrams. Emphasis on graphics with clear, bespoke figures. Step-by-step worked examples. Includes a short quiz at the end modeled on past paper multiple choice questions. Unit test for syllabus sect