Cell Structure (AQA GCSE Biology Combined Science): Flashcards

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Microscopes and magnification
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Maximum magnification of light microscope

×2000

Maximum magnification of electron microscope

×2 million

What electron microscopes use to create images

Electrons

Definition of resolving power

Ability to separate two objects very close together

Resolving power of light microscope (nm)

200 nm

Best resolving power: transmission electron microscope (nm)

0.1 nm

Formula for magnification

size of imagesize of real object\frac{\text{size of image}}{\text{size of real object}}

Formula for size of real object

size of imagemagnification\frac{\text{size of image}}{\text{magnification}}

Convert 1 mm to micrometres (μm)

1000 μm

What scale bars show on microscope images

Actual size of structures in the image

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