BIO 101: Lab 4 - Care and Use of the Microscope

stage

platform which supports the specimen being viewed

arm

curve or slanted part which is held while carrying the microscope

ocular lens (eyepiece)

the lens that you look through

objective lenses

the lenses that are used to magnify the object

coarse adjustment knob

big knob moving the stage up and down

fine adjustment knob

small knob moving the stage up and down

base (foot)

the bottom of the microscope, used for support

slide

rectangular glass plate on which the specimen is mounted

total magnification

The power of a microscope, found by multiplying the power of the (eyepiece) by the power of the objective lens.

specimen

sample that is prepared to be viewed

Compound microscope

A microscope with two or more lenses.

field-of-view

When you look down a microscope, the circle that you see is called ''______”

Anton van Leeuwenhoek

Made his discovery by using a simple microscope to look at tiny drops of water magnified 266 times to see tiny organisms.

400X

The total magnification of a 10X eyepiece lens coupled with the high power 40X objective lens?

condenser

focuses light through the specimen

iris diaphragm

controls the amount of light passing through the specimen

nosepiece

Holds the objectives and can be rotated to change the magnification

light source

provides light

mechanical stage

holds the slide in position for viewing and has two adjustable knobs that control the precise movement of the slide

how to carry a microscope

one hand on the arm and one hand on the base

field of view

The area visible through the microscope eyepiece

how to clean and store a microscope

use a lens wipe (not a tissue/towel/sleeve etc); unplug it, rotate to the scanning objective lens, put the stage in its lowest position, cover it with a dust cover, place it in the cabinet

wet mount

a glass slide holding a specimen suspended in a drop of liquid (as water) for microscopic examination