Microscopy - Cell Biology

Question 1

Centimetre to millimetre

Answer 1

X10

Question 2

Millimetre to micrometre

Answer 2

X1000

Question 3

Micrometre to Nanometre

Answer 3

X1000

Question 4

Rank the units of measurement

Answer 4

1. Centimetre
2. Millimetre
3. Micrometre
4. Nanometre

Question 5

How do you calculate magnification?

Answer 5

Magnification = Image size/actual size

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Question 6

What is magnification?

Answer 6

The degree to which the size of an image is larger than the object itself/ How many times bigger the size of the image is than the object

Question 7

What is resolution?

Answer 7

Thee degree to which it’s possible to distinguish between 2 objects that are very close together

Question 8

What is the diaphragm?

Answer 8

Controls amount of light that enters and exists

Question 9

Benefits of light microscope:

Answer 9

• Have colour
• Cheaper
• Portable
• Can see live substances

Question 10

Disadvantage of light microscope:

Answer 10

• Lower resolution and magnification in comparison to electron microscopes

Question 11

Benefits of electron microscope:

Answer 11

• Higher magnification and resolution

Question 12

Disadvantages of electron microscope:

Answer 12

• Expensive
• Too large
• Can’t see live specimens
• Black & white

Question 13

What does the mirror do in light microscopes?

Answer 13

It reflects light into the lens then into the eye

Question 14

How does an electron microscope work?

Answer 14

It uses a beam of electrons

Question 15

What is a scanning electron microscope?

Answer 15

It lets you view specimens in 3D

Question 16

Why do electron microscopes have a higher magnification and resolution?

Answer 16

Electron beams have a smaller wavelength than light beams.