Microscopes and Magnification

Question 1

Describe how to use a ×5 eyepiece lens microscope to observe a prepared slide of root hair cells at a
magnification of ×50: (4)

Place a _______ on the _____. Use _______________ initially.

Move the stage as close to the ______ as possible without the slide _______________.

Turn the ________________ until the image comes into _______.

Change the _____________ to ____, so the total magnification is ____.

Answer 1

slide
stage
lowest power

lens
touching the lens

focussing knob
focus

objective lens
x10
x50

Question 2

What is the equation for magnification?

Answer 2

magnification= size of image/ real size of object

Question 3

What is the scale of a micrometre out of millimetres?

Answer 3

1/1000 millimetres

Question 4

What is the scale of a nanometre out of micrometres?

Answer 4

1/1000 micrometres

Question 5

____________________ provide a higher ________________ and higher ______________ than a _____________________.

But cannot be used to view __________ cells.

Answer 5

Electron microscopes
magnifications
resolution
light microscope
living

Question 6

What is produced as a result of electron microscopes having a very large magnification?

Answer 6

They can produce images of much smaller objects.

So you can see more accurate images.