B1.1 The World of Microscopes Flashcards
1 kilometre (km) equals to how many metres (m)
1000 metres (m)
1 metre (m) equals to how many centimetres (cm)
100 centimeters (cm)
1 centimetre (cm) equals to how many millimetres (mm)
10 millimetres (mm)
1 millimetre (mm) equals to how many micrometres (µm)
1000 micrometres (µm)
1 micrometre (µm) equals to how many nanometres (nm)
1000 nanometres (nm)
What has a higher magnification light microscopes or electron microscopes
Electron microscopes
Can an electron microscope be used to see live specimen
No
Whats the function of the eyepiece
magnifies the image produced by the objective
Whats the function of the objective lenses
Produces a greatly magnified image of the specimen
Whats the function of the coarse focus
Rapidly adjusting the focus of the microscopes objective lens to bring the specimen into a rough focus range
Whats the function of the fine focus
It helps focus the image so it clearer
Whats the equation for calculating magnification
size of image/size of real object
Whats the equation for calculating the size of real object
Size of image/magnification
Whats the equation to find the size of image
magnification x size of real object
Define resolution
a measure of the microscopes ability to distinguish two objects from eachother
Define magnification
The increase in size of an object when it is viewed through a microscope
Name one advantage of using a light microscope
• Its able to view live and dead specimen
• Cheaper
•Easy to use
Name one advantage of using an electron microscope
• High magnification
• High resolution
Name one disadvantage of using a light microscope
• The magnifying power is limited to 2000x
• Low resolution
Name one disadvantage of using an electron microscope
• Expensive
• Not able to view live specimen
• Difficult to store somewhere (needs a specific temperature, pressure and humidity)
