An eyepiece graticule must be recalibrated when

  1. the light is dimmed
  2. the slide is moved
  3. the specimen is changed
  4. the objective lens is changed
Answer

D) the objective lens is changed

Each objective changes the value of one eyepiece unit. AS & A Level Biology · Topic 1 Cell Structure · 1.1 The microscope in cell studies

Biology MCQ · More A Level Biology: Cell structure MCQs · Practise