Microscopes

Question 0

Define cell

Answer 0

The smallest structural and functional unit of living organisms, which are capable of independent existence and reproduction.

Question 1

The formula for magnification…

Answer 1

Magnification=image size/ actual size(um)

Question 2

Magnification

Answer 2

The degree to which the size of an image is larger than the viewed specimen itself
Or
The increase in the size of a specimen to produce a magnified image (which can be real or virtual)

Question 3

Define resolution

Answer 3

The degree to which it is possible to distinguish between two objects (adjacent points) that are very close together

Question 4

How to work out the limit of resolution

Answer 4

Approximately half the wavelength of the radiation used

Question 5

Cell theory

Answer 5

• all living things made of cells
• cells are the smallest independent unit of life
• new cells formed by division of pre-existing cells
• contain hereditary information passed on to new cells
• organisms made of one cell (unicellular e.g.amoeba) or multicellular (e.g. Humans)

Question 6

What are the two main types of microscopes

Answer 6

The light (optical/compound) microscope 
The electron microscope

Question 7

What are the two different types of electron microscopes?

Answer 7

The scanning electron microscope

The transmission electron microscope

Question 8

What does magnification do to the resolution?

Answer 8

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