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Cambridge IGCSE Biology practice

What is the correct formula to calculate magnification?

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At a glance

MCQ

Type

cambridge_mcq

Style

Topic

Size of specimens

Exam-style question

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What is the correct formula to calculate magnification?.

  1. A.Magnification = Actual size ÷ Image size
  2. B.Magnification = Image size ÷ Actual size
  3. C.Magnification = Image size × Actual size
  4. D.Magnification = Actual size - Image size

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Paper 3 structured question: Size of specimens

Paper 3Theory (Core)3 marks

Description

Microscope Observation

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

  1. a

    State the formula for calculating magnification.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify the magnification of the insect image.

    Aim for approximately 2 distinct marking points.

    [2]