Biology 1st sem

An instrument that produces magnified images of tiny structures

Microscope

They are located at the top of the

microscope. This part is used to look

at the specimen.

Eyepiece

It carries the

eyepiece just above the objective lens.

Eyepiece tube

control knob present only in the

binocular microscope that is used to

change focus on one eyepiece.

Diopter adjustment

What are the three kinds of Microscope

Binocular Monocular Electron

a movable

circular structure that houses all the

objective lenses.

Revolving Nose piece

the lens that is

closest to the specimen.

Objective lens

used to sharpen the image.

Fine adjustment knob

Used for focusing the image under

low power magnification.

Coarse adjustment knob

section in which the specimen

is placed for viewing. They have stage

clips that hold the specimen slides in

place.

Stage

Are the control knobs used to

move the stage mechanically.

Stage control knobs

a hole in the

microscope stage through

which the transmitted light

from the source reaches

the stage.

Aperture

This is the light source.

Microscopic illuminator

lenses that are used to

collect and focus light from the

illuminator into the specimen.

Condenser

It’s also known as the iris. found under

the stage of the microscope, and its

primary role is to control the amount of

light that reaches the specimen.

Diaphragm

knob that moves the

condenser up or down,

Condenser Focus knob

condenser specially designed

for high-quality microscopes

Abbe condenser

controls how

far the stages should go,

Rack stop

used to on and

off the illuminator.

Light switch

controls the voltage supplied to the

light bulb,

Brightness adjustment

Used to hold down the specimen

Stage clip

Use to hold the specimen

stage plate

place to hold the microscope

Arm

It is how much of the specimen we can be

able to see through a microscope.

FOV

How to get FOV

FN / OL

how do we find total Magnification

EM x OL

What is the red objective lens

4x

What is the blue objective lens?

40x

what is the yellow objective lens

10x

What is the white objective lens?

100x

What is the name of the 4x lens

Scanning lens

What is the name of the 10 x

Low power

What is the name of the 40x

High power

what is the name of the 100x

Oil immersion

Explain why the image because inverted

it becomes inverted due to refraction from the converging light rays, This reverses it and is called an intermediate image/real image