Lab 2: Microscopy and Cell Structure Flashcards
where and when were the first microscopes made?
1600 in the Netherlands
who made the first compound microscope?
Galilei
Which has a smaller wavelength: electrons or visible light?
electrons
What is B?
Objective lens
What is F?
Course Focus Adjustment Knob
What is A?
Eyepiece (ocular)
What is C?
Stage
What is D?
Iris diaphragm ring
What is E?
Base
What is G?
Fine focus adjustment knob
Memorize this
Memorize
To view a specimen under an electron microscope, it has to be living.
T/f
false
What determines resolution
Visual Acuity
Lens Quality
Magnification
Lens Diameter
Ocular lenses found in most compound light microscopes a magnification of
10x
which have a higher magnification
Dissecting microscopes or compound microscopes.
compound microscpes
Produce 3-D images of the surfaces of objects.
scanning electron microscope (SEM)
You are using a compound microscope and you have the objective lens set to 40x. What is the total magnification you are using to view the specimen?
400x
If you were given a sample of bacteria to analyze, which microscope would be best for quickly identifying the specimen?
compound
use visible light to visualize small structures.
Light microscopes
High-powered compound
microscopes allow for magnification up to about what?
1000x
while dissecting microscopes allow for magnification up to what?
100x
which is the ratio of the size of the
image seen in the microscope versus the actual size of the object.
magnification
The magnification of a light microscope is limited by what?
the wavelength