Microscopes Flashcards
What is the magnification and what can be seen through a light microscope?
Magnify up to 1500 times and can see individual animal and plant cells with organelles inside them
What happens if the cells have been stained?
You can see the dark-coloured nucleus surrounded by lighter-coloured cytoplasm and tiny mitochondria and the black line of the cells membrane are also visible
In plant cells what can be seen?
The cell wall, chloroplasts and the vacuole
What is another name for a light microscope?
An optical microscope
What is the function of the eyepiece?
You look down it
What is the function of the coarse adjustment knob?
To bring the specimen roughly into focus
What is the function of the fine adjustment knob?
To finely tune the focus
What is the function of the high and low power objective lenses?
These magnify the specimen
What is the function of the stage?
Where you put the microscope slide
What is the function of the light?
So that you can see through the specimen
When was the detailed ultrastructure of cells reveal and why?
In the 1950s when the election microscope was invented
How many times more can an electron microscope magnify objects, and allows what?
More than 500,000 times and it allows greater detail to be seen than a light microscope
What can be seen through an electron microscope?
The detailed structures inside organelles (such as mitochondria and chloroplasts)
What is the image recorded on an electron microscope called?
An electron micrograph
