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13 Cards in this Set

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What is magnification?

Magnification is how much an object can be enlarged under a microscope.

What is the formula for magnification?

Magnification =


measured image ÷ real image


What is resolution?

Resolution is how distinguishable one point is to another in a picture.



Closer together = higher resolution required.



Further apart = lower resolution required.



A resolution 200nm means that two points that are 200nm or more apart can be distinguished.

What is a light microscope?

A microscope used to detect small objects with its technology which employs visible light.

What is the highest resolution and magnification of a light microscope?

Res = 200nm


Mag = about 1500x

What is an electron microscope?

Electron microscope is a type of microscope that uses a beam of electrons to create an image of the specimen

One reason why electron microscopes can't observe living cells

Because electron microscopes operate in vacuums. In a vacuum, water boils at room temperature, so cell have to be dehydrated before being observed.

Why do electron microscopes operate in a vacuum?

To avoid the scattering of electrons.

What is a millimeter?

A millimeter (mm) is one thousandth of a metre.

What is a micrometer?

A micrometer (or μm) is one millionth of a meter.

What is a nanometer?

A nanometer (or nm) is one thousand- millionth of a meter.

What is a picometer?

A picometer (or pm) is one trillionth of a meter.


1x10-12

What is standard form?

A way of writing down very large or very small numbers.