Microscopes

Question 1

What is a light microscope?

Answer 1

It uses light to magnify objects and its greatest possible magnification of x2000.

Question 2

What is an electron microscope?

Answer 2

It uses electrons to view an object and it can magnify objects up to x10 million. You can see objects in cells more clearly and in far more detail than a light microscope.

Question 3

How do you calculate magnification?

Answer 3

real size

1) measure image in mm.
2) multiply by 1000 to get the measurement in micrometres.
3) if the image has a scale bar the use that to find the answer.

Question 4

How do you calculate magnification of an object?

Answer 4

magnification of eyepiece X
magnification of objective.

Question 5

What are the smaller units?

Answer 5

milli- 10( power of -3 )
micro- 10( power of -6 )
nano- 10( power of -9 )
pico- 10( power of -12 )

Question 6

How do you use a light microscope safely?

Answer 6

• start with the lowest power objective under the eyepiece.
• clip the slide securely on stage.
• adjust the light source ( mirror ) so the light goes through the slide.
• use the focusing wheel to focus on the slide.
• move the slide so its in the middle of the view.
• if you need move a higher power objective into position above the slide.
• use the focusing wheel to put the slide back into focus.