forensics microscope quiz

Eyepiece

• Also know as the ocular len

• A place to view the specimen

Body Tube

• In between the ocular lens and objective lens, so we can get an appropriate magnification

Revolving Nose Piece

• Rotates to change between different ovjective lens

Objective Lens

• 3 or 4 different lenses (4X, 10X, 40X)

• 4X=shortest (Low)

• 10X= medium

• 40X=highest (High); closest to the specimen

Stage

• Holds the slide and has a window that allows light to pass through specimen

Diaphragm

• Turns to adjust the amount of light that passes through the specimen

Arm

• Allow user to hold the microscope securely

Base

• Supports the microscope

Stage Clips

• These clips hold the slide in place on the stage for viewing

Light Source

• Shines light upward through the specimen and to the lens

Fine Adjustment Knob

• fine tunes the focus

• used with all objective lens

Course Adjustment Knob

• moves stage up and down

• move this first

• used only with low and medium objective lens

A compund light microscope uses _____ lenses

two

Light passes through a sample which creates an __________

image

The image passed through an ____________ lens first then an eyepiece before reaching your _________

objective; eye

the two lenses work ______________ to magnify the image so that it appears larger to your eye

together

(objective lens) 4X times 10X(eyepiece) total magnification equals

40X

(objective lens) 10X times 10X(eyepiece) total magnification equals

100X

(objective lens) 40X times 10X(eyepiece) total magnification equals

400X

Always carry the microscope by the _________ and __________

arm; base

Always start viewing a specimen on the ___________ power

lowest

Adjust the diaphragm to ensure ________ is passing through the specimen

light

Clean the lens with _______ paper only

lens

Return the objective lens to _______ power when finished

Low

Ensure that slides are removed from the microscope and the cord is _____ around the microscope

coiled

Always place a ____ ______ over the microscope

dust cover

Always lower the ______ before putting the microscope away

stage

Keep the microscope _______

clean

Keep it ________ when not in use

covered

do not use the course adjustment knob with the ________ object lenses. YOU COULD BREAK THE SLIDE

high

Don’t put the ________ directly on the micrscope stage. Always use a prepared _______

specimens, slide

Don’t touch the lenses with you ______ or other _______

hands; objects

Label 1

Body Tube

Label 2

Eyepiece (Ocular Lens)

Label 3

Revolving Nose Piece

Label 4

Arm

Label 5

40X Lens High

Label 6

Stage Clips

Label 7

Course Adjustment Knob

Label 8

Fine Adjustment Knob

Label 9

Base

Label 10

Diaphragm

Label 11

Light Source

Label 12

Stage

Label 13

4X Objective Lens (Low)

Label 14

10 X Medium Lens