CB1a Microscopes

Question 1

Resolution (definition)

Answer 1

the smallest distance between two points that can still be seen as two points

Question 2

Magnification (Calculation)

Answer 2

Image Size = Actual Size x Magnification

Question 3

Two reasons electron microscopes are better than light microscopes (2 mark answer)

Answer 3

• Better resolving power (resolution)

- Higher magnification

Question 4

How electron microscopes work?

Answer 4

Instead of light, beams of electrons pass through a specimen to build up an image

Question 5

What is a stain?

Answer 5

A stain is a dye used to colour parts of a cell and make them appear clearer

Question 6

What is the highest magnification a light microscope can reach today?

Answer 6

x 1,500

Question 7

What is the highest magnification an electron microscope can reach up to today?

Answer 7

x 2,000,000

Question 8

Magnification of a microscope

Answer 8

eyepiece lens x objective lens

Question 9

Field of view (definition)

Answer 9

The circular area seen when looking down a light microscope