OCR A 2.2 Calibrating a microscope for 2026-2027 exams (PAG 1.1 / 1.2 / 1.3)

The exact steps to calibrate a microscope on all powers (low to high) Explained carefully with worked examples and real exam questions for A-level Biology designed specifically for new year 12 OCR A students, however suitable for AQA and Edexcel questions. It comes with the free workbook for module 2: Download here: https://www.stemcelltuition.com/FreeW... Timestamps 00:00 Introduction & What You'll Learn 00:13 Free download 00:24 What is calibration 03:18 Ratio modelling 10:17 Exam practice