Cell Structure

A-LEVEL - OCR - BIOLOGY

'Complete the sentence' - style flashcards

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  • Created by: KHill
  • Created on: 09-09-14 11:25
A light microscope works by projecting a light through a...
specimen, then focusing it with a series of lenses to magnify the image
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Total Magnification =
Power of the eyepiece lens x Power of the objective lens.
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Magnification is...
how much larger an image appears than the object actually is.
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Magnification =
Image size / Actual size.
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Good light microscopes are capable of magnification of up to...
x1500.
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Increasing the magnification may not be useful due to...
the limits of resolution of light.
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Resolution is...
the ability to distinguish between two seperate points.
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Increasing resolution allows you to see more...
detail.
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What is the disadvantage of light microscopes?
Light microscopes' limit of resolution is 200nm
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What are 3 advantages of light microscopes?
1) They are relatively cheap 2) Living organisms can be viewed 3) Thin sections of larger specimens can be studied
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Samples are often stained which...
bind to chemicals in the specimen to allow them to be seen
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Samples are stained with...
Acetic Orcein or Gentain Violet
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Other cards in this set

Card 2

Front

Power of the eyepiece lens x Power of the objective lens.

Back

Total Magnification =

Card 3

Front

how much larger an image appears than the object actually is.

Back

Preview of the back of card 3

Card 4

Front

Image size / Actual size.

Back

Preview of the back of card 4

Card 5

Front

x1500.

Back

Preview of the back of card 5
View more cards

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