Two types of microscopes
Light
Electron
Magnification
How many times larger an image is than the real object
Resolution
The ability to distinguish two points
What type of microscope has the highest resolution and magnification
Electron
What parts of cells cannot be seen using a light microscope
Sub cellular structures
Equation for magnification
Image
———
Actual
Units for image and actual size
Milimeters and micro meters
How do you convert from millimetres to micrometers
X1000
How do you convert from micrometers to millimetres
Divide by 1000
Equation for magnification of lenses
Eye piece lens x objective lense
What does focussing mean
Make the image clear
Two focussing wheels
Coarse and fine
Which objective lense should you use first
Lower magnifying power
Why should you start with the lowest magnification
Largest file of view
Steps of viewing cells
Slide on stage
Look through eyepiece lens
Turn the coarse focus knob until cells are in focus
Increase the objective lens magnification
Then the fine focus Knob until cells are in focus
What are onion cells stained with
Iodine solution
Why re the cells stained with iodine solution
So the sub cellular structures can be seen
