Term
IMAGING TECHNOLOGY AND THE CELL
A WINDOW ON A NEW WORLD
MAGNIFICATION |
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Definition
* An increase in the apparent size of an object calculated as the product of the magnifying power of the objective lens and the magnifying power of the eyepiece
* When using a microscope, it is important to be able to calculate the magnification of the lens system |
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Term
A WINDOW ON A NEW WORLD
MAGNIFICATION |
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Definition
* To calculate the magnification of a compound microscope, multiply the power of the objective lens by the power of the eyepiece
* Example; if the power of the objective lens is 40X & the power of the eyepiece is 10X, the magnification is calculated as follows:
magnification = (power of objective lens)(power of eyepiece)
= (40)(10) X
= 400 X |
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Term
A WINDOW ON A NEW WORLD
FIELD OF VIEW |
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Definition
* The area seen under a microscope with a given objective lens
* The area you see when you look through the eyepiece of a microscope
* When using a microscope, it is important to be able to estimate an object's size using the field of view |
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Term
A WINDOW ON A NEW WORLD
PARTS OF A MICROSCOPE |
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Definition
Base of a microscope: part of a microscope that holds the body and stage in place
Coarse adjustment knob: a knob on a microscope used to focus the low-power or medium-power objective lenses
Diaphragm: a part of a microscope that can be adjusted to allow various amounts of light to pass through a specimen |
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Term
A WINDOW ON A NEW WORLD
PARTS OF A MICROSCOPE |
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Definition
Eyepiece: the lens located at the upper end of the body of a microscope; the lens that magnifies the image from the objective lens
Fine adjustment knob: a knob on a microscope used to focus the high-power objective lens
Objective lenses: lenses located at the lower end of the body of a microscope; lenses that gather light from the specimen & that magnify & invert the image |
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Term
A WINDOW ON A NEW WORLD
PARTS OF A MICROSCOPE |
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Definition
Revolving nosepiece: part of a microscope that holds the objective lenses & allows them to be rotated into position
Stage: part of the microscope that holds the slide in position for viewing
Stage clips: parts of the microscope used to hold the slide in position |
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