Microscopes

Question 1

How many times does a hand lens magnify?

Answer 1

2 or 4/5 times

Question 2

A compound light microscope

Answer 2

• found in most schools
• thin specimens are seen, light is transmitted through specimen
• lenses bend and refract light
• cells can be stained with color to make it more visible
• 1000-2000X

Question 3

Electron Microscope

Answer 3

• emits beam of electrons
• 1000X more powerful than light microscope
• images are obtained in black and white

Question 4

Types of electron microscopes

Answer 4

1. Transmission Electron Microscope (TEM)

2. Scanning Electron Microscope (SEM)

Question 5

Transmission Electron Microscope (TEM)

Answer 5

• electrons passes through thin specimens
• see internal detail of cells
• magnifies up to 10 000 000
• 2D

Question 6

Scanning Electron Microscope (SEM)

Answer 6

• electrons are bounced off surface of specimen so surface detail is visible
• 3D

Question 7

What are photographs through a microscope called?

Answer 7

Micrographs

Question 8

Using a microscope

Answer 8

1. Stand microscope on flat, even surface.
2. Click low power objective lens into position.
3. Plug in and switch on.
4. Open diaphragm
5. Turn coarse focus adjustment screw to lower slide.