FRSC365 EXAM 2 QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED GRADED A++
what are a few key differences between compound and stereomicroscopes?
- no 3D view
- smaller working distance
- smaller field of view
what are the main components of a CM?
eyepiece, head, stand, revolving nosepiece, objective lens, stage, condenser,
condenser focus knob, field diaphragm, base, fine focus knob, coarse focus knob
what is always the magnification of the eyepiece?
10X
what is the observation tube?
where the eyepiece fits into
what is the head?
top part of CM, has eyepiece, observation tube, revolving nosepiece, and objective
lenses
what is the revolving nose piece?
holds the objective lenses
what is the stand?
backbone of the CM
what is the objective lens?
,lens closest to the specimen
what are the main magnifications of the three objective lenses?
10X, 20X, 40X
what is the stage?
holds slide in position
what is the condenser?
not involved in the magnification, but helps concentrate the light from the illuminator
what is the condenser focus knob?
moves the condenser closer/farther away from the stage
where is the condenser focus knob?
behind and under the stage on the left side of the microscope
what is the field diaphragm?
reduces stray light entering the condenser
what is the base?
base of the microscope
what is the fine focus knob?
permits precise focusing once coarse focusing has been completed
what is the coarse focus knob?
changes the distance between the objective lens and the specimen to permit rough
focusing
what is the stand of a CM used for?
stability and rigidity
what is usually included in the base of the CM?
, frame, condenser, FFK, CFK, field diaphragm (and control), light source, illumination
intensity control
what is voltage controlled by in a CM?
rheostat
what are the two kinds of lamp filaments in a CM?
centerable and pre-centered
what does the diffuser filer/lens do?
frosted lens that hides the filament and spreads light from the lamp evenly
where should the lamp filament be in your FOV?
center
what does field diaphragm affect?
contrast
how do you close your field diaphragm?
until it's just outside of your field of view
what controls the width of the condenser opening?
aperture diaphragm
what does the width of the aperture diaphragm adjust?
width of inverted cone of light
if there is a wider opening in the aperture diaphragm...
...the cone of light is wider
where does the inverted cone of light travel to?
objective lens
where is light focused on using the condenser?
SOLUTIONS VERIFIED GRADED A++
what are a few key differences between compound and stereomicroscopes?
- no 3D view
- smaller working distance
- smaller field of view
what are the main components of a CM?
eyepiece, head, stand, revolving nosepiece, objective lens, stage, condenser,
condenser focus knob, field diaphragm, base, fine focus knob, coarse focus knob
what is always the magnification of the eyepiece?
10X
what is the observation tube?
where the eyepiece fits into
what is the head?
top part of CM, has eyepiece, observation tube, revolving nosepiece, and objective
lenses
what is the revolving nose piece?
holds the objective lenses
what is the stand?
backbone of the CM
what is the objective lens?
,lens closest to the specimen
what are the main magnifications of the three objective lenses?
10X, 20X, 40X
what is the stage?
holds slide in position
what is the condenser?
not involved in the magnification, but helps concentrate the light from the illuminator
what is the condenser focus knob?
moves the condenser closer/farther away from the stage
where is the condenser focus knob?
behind and under the stage on the left side of the microscope
what is the field diaphragm?
reduces stray light entering the condenser
what is the base?
base of the microscope
what is the fine focus knob?
permits precise focusing once coarse focusing has been completed
what is the coarse focus knob?
changes the distance between the objective lens and the specimen to permit rough
focusing
what is the stand of a CM used for?
stability and rigidity
what is usually included in the base of the CM?
, frame, condenser, FFK, CFK, field diaphragm (and control), light source, illumination
intensity control
what is voltage controlled by in a CM?
rheostat
what are the two kinds of lamp filaments in a CM?
centerable and pre-centered
what does the diffuser filer/lens do?
frosted lens that hides the filament and spreads light from the lamp evenly
where should the lamp filament be in your FOV?
center
what does field diaphragm affect?
contrast
how do you close your field diaphragm?
until it's just outside of your field of view
what controls the width of the condenser opening?
aperture diaphragm
what does the width of the aperture diaphragm adjust?
width of inverted cone of light
if there is a wider opening in the aperture diaphragm...
...the cone of light is wider
where does the inverted cone of light travel to?
objective lens
where is light focused on using the condenser?
