A concise study and reference guide for SL & HL IB Physics. The guide helps to explain all the tricky formulae and when to use them provides easily understandable definitions for every word and law in the syllabus and gives step-by-step instructions for useful derivations. Use it for quizzing yourself and others as an aid while doing tests and exams or simply as a here-to-help formulae book. This guide covers the entire SL & HL syllabi and has been revised in line with suggestions and improvemen