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13 Cards in this Set
- Front
- Back
What is magnification? |
Magnification is how much an object can be enlarged under a microscope. |
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What is the formula for magnification? |
Magnification = measured image ÷ real image
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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. |
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What is a light microscope? |
A microscope used to detect small objects with its technology which employs visible light. |
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What is the highest resolution and magnification of a light microscope? |
Res = 200nm Mag = about 1500x |
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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 |
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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. |
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Why do electron microscopes operate in a vacuum? |
To avoid the scattering of electrons. |
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What is a millimeter? |
A millimeter (mm) is one thousandth of a metre. |
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What is a micrometer? |
A micrometer (or μm) is one millionth of a meter. |
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What is a nanometer? |
A nanometer (or nm) is one thousand- millionth of a meter. |
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What is a picometer? |
A picometer (or pm) is one trillionth of a meter. 1x10-12 |
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What is standard form? |
A way of writing down very large or very small numbers. |