Learning objective

Identify and apply the formula for calculating magnification, which is magnification equals image size divided by actual size.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE BiologyOrganisation of the organismCore content

Study support

Understand this objective

Quick explanation

This point belongs to Size of specimens, especially Size of specimens outcomes.
You need to be able to identify and apply the formula for calculating magnification, which is magnification equals image size divided by actual size.
The key ideas to know are State and Use.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

StateUse

Why it matters

This objective helps connect Size of specimens outcomes to exam-style questions, flashcards, and revision notes for Size of specimens.

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

Question 1 of 7

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0 of 5 attempted

Paper 3Theory (Core)3 marks

Description

The student measures the image length of the insect as 10 mm and knows the actual length is 2 mm.

a
State the formula for calculating magnification.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify the magnification of the insect image.
Your answer
Aim for approximately 2 distinct marking points.
[2]

Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

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