microscope Flashcards
the upper part of the microscope that supports the ocular lenses and various objective lens
head
the broad flat lower part of the microscope that supports
base
the vertical part of the microscope that connects the head to the base
arm
lens located within the eyepiece, monocular microscopes have one ocular lens, whereas binocular microscope have two ocular lenses,
ocular lenses, typically magnify objects
magnifying lenses mounted on a rotating nose piece, most microscopes have four
objective lenses
4x=
scanning
10x=
low power
40x=
high power
100x=
oil immersion-largest total magnification
the objective lens of compound light microscope are attached to the
connects the objective lenses to the head and allows different objective lenses to be moved into place
rotating nosepeice
which microscope structure concentrates light onto the specimen
condenser
is the distance between the speciemen and the bottom of the objective lens
working distance
flat, horizontal shelf onto which the side is placed and typically secured with a spring clamp, two control knobs can be used to move the stage to position the slide
mechanical stage
small lens locate under the stage that concentrates ligt onto the specimen
condenser
located beneath the condenser regulates the amount of light that passes through the condenser
iris diaphragm lever
located in the base, provides the light that passes through the condenser, the specimen, the lenses and finally into your eyes
sub stage light
circular area on stage through which light passes
aperture
moves the slide on stage
mechanical stage controls
lenses of various powers of magnification
objective lense
total magnification is calculated by
multiplying the power of ocular lens by the power of the objective lens
concentrates light on the specimen
condensor
regulates the amount of light passing through the specimen
iris diaphragm lever
connects the objective lenses to the head of the microscope
rotating nosepiece
magnifies the specimen
ocular and objective lens
Define working distance
is the distance between the specimen and the bottom of the objective lens
What happens to working distance as total magnification increases?
it decreases
The relationship between magnification and field size is inverse and equal. If the field diameter for the 4x objective is 4.5mm, then what is the field diameter when using the 10x objective
1.8mm
Begin the focusing process with the
scanning lens/lowest power
Store the microscope with the ? in place
lowest power lens
The coarse adjustment knob can be used with ? lens
low
As you move from lower magnification to higher magnification field diameter will:
decrease
As you move from lower magnification to higher magnification working distance will:
decrease
