Biology A-Level
Calibration of the eyepiece graticule
What Calibration of the eyepiece graticule means in Biology A-Level, as defined for OCR.
Definition of Calibration of the eyepiece graticule
Check what you remember
Read the wording for your board, then hide it and explain Calibration of the eyepiece graticule in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The scale in the eyepiece must be calibrated for each objective using a stage micrometer of known scale, giving a calibration factor that converts graticule units into actual lengths.
Topics that use Calibration of the eyepiece graticule
- Use of apparatus and techniques (OCR A-Level)
Related terms
- Accuracy of observation transferred to paper
- Accurate reading of scales and menisci
- Annotation as recorded evidence
- Apparatus selection
- Clarity and convention in biological drawing
- Colorimetry and calibration
- Computer modelling
- Control of variables
Using Calibration of the eyepiece graticule in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge