B1.1 The world of microscopes

Question 1

1cm is how many millimetres?

Answer 1

10

Question 2

1mm is how many micrometres?

Answer 2

1000

Question 3

What are the benefits of a light microscope?

Answer 3

Can magnify around 2000 times
Cheap
Can be used almost anywhere
Can magnify live specimens

Question 4

How does an electron microscope work?

Answer 4

Uses a beam of electrons to form an image

Question 5

What does a transmission electron microscope give?

Answer 5

Gives 2D images

Very high magnification and resolution

Question 6

What does a scanning electron microscope give?

Answer 6

Dramatic 3D images

Lower magnification

Question 7

What are the disadvantages of an electron microscope?

Answer 7

Large
Very expensive
Have to be kept in special conditions

Question 8

How do you calculate magnification?

Answer 8

Multiply the magnification of the eyepiece lens by the magnification of the objective lens

Question 9

What is the formula for magnification?

Answer 9

Magnification = size of image/ size of real object

Question 10

What is resolution?

Answer 10

Is the ability to distinguish between two separate points