Microscopes
The microscope is supported by the sturdy base. The arm connects it to the body tube.
The microscope is supported by the sturdy base. The arm connects it to the body tube.
When was the microscope invented?
The microscope was invented around 1590?
convex lens
a curved lens in which the lens is thicker than the edges
light microscope
a type of microscope which uses visible light and a system of lenses to magnify images of small samples
cell theory
a widely accepted explanation of the relationship between cells and living things
inclination joint
above the base that allows the body tube to be tilted backward so one may more comfortably view the object.
What can a stereoscope do?
can be used to see flowers in greater detail has two oculars and two or three objectives
compound light microscope
has more than one lens
What can a simple light microscope do?
has only one lens used by Leeuwenhoek to view "animalcules"
simple microscope
having one lens or lens system, such as a magnifying glass or hand lens
stage clips
hold the slide in place on the stage
rheostat
light adjustor wheel used to control the amount of light passing through the slide. The reeostat is located on the base of the microscope on the right side.
diaphragm
located under the stage.
ocular lens
located within the eyepiece and further maginfies the image of the object. The ocular usually has a magnifying power of 10x. This means that the ocular by itself makes the object appear ten times bigger to a viewer than it really is.
body tube
maintains the proper distance between the eyepiece and the objective lenses. It is the part of the microscope that allows light to pass upward to the eyepiece.
illuminator
may be either a lamp or a mirror. It either produces or collects light and directs it through the opening in the stage.
coarse adjustment knob
moves the stage up and down to bring the image into focus.
arm
supports the body tube and is used for carrying the microscope.
base
supports the microscope and is also used for carrying the microscope. Always carry the microscope by holding the arm with one hand and placing your other hand under the base.
stage
supports the slide being viewed.
resolution (or resolving power)
the ability to clearly distinguish the individual parts of an object
magnification (or magnifying power)
the ability to make things look larger than they are
cell
the basic unit of structure and function in living things
field of view
the circular area you see when you look through a microscope
Focusing the image is done turning one of the adjustment knobs. The coarse adjustment knob is used to focus at low power. It visibly moves the stage up and down. Never use this adjustment knob at high power unless you are watching from the side or turning it away from you.
Focusing the image is done turning one of the adjustment knobs. The coarse adjustment knob is used to focus at low power. It visibly moves the stage up and down. Never use this adjustment knob at high power unless you are watching from the side or turning it away from you.
If your microscope uses a mirror instead of a lamp, never use direct sunlight as a source of light. Direct sunlight reflected off the mirror can damage the eye.
If your microscope uses a mirror instead of a lamp, never use direct sunlight as a source of light. Direct sunlight reflected off the mirror can damage the eye.
What did the invention of the microscope allow?
It allowed people to look at very small objects.
What does a microscope do?
It makes small objects look larger.
What tow things must a microscope have to be useful to a scientist?
It must combine magnification and resolution.
What is the ability of a microscope to separate small distances called?
It's called resolving power or resolution.
What is the circular area you see when you look into the eyepiece of a microscope called?
It's called the field of view.
What is the difference between a simple microscope and a compound microscope?
Simple microscopes are usually able to be moved and a compound microscope is usually hard to move.
eyepiece
the part of the microscope that one looks through to view an object placed on the stage.
revolving nosepiece
the rotating disk that holds the objective lenses.
animalcules
tiny one celled animal-like organisms living in water. Today, we call protists.
What can an electron microscope do?
use a beam of charged particles to view objects sometimes, only dead specimens can be viewed can magnify images up to 1,000,000x focuses not with lenses, but with magnets
What can a Compound light microscope do?
use two different lenses together to view objects used by Hooke to discover cells
stereoscope (or stereoscopic microscope)
used for viewing something in 3D
electron microscope
used for viewing viruses or parts of a cell
fine adjustment know
used to bring images into clear, sharp focus.
objective lenses
usually two to four on a compound microscope
How many different types of microscopes are there?
There are many different types of microscopes.
What do microscopes allow you see?
They allow you to see fine details.
A compound light microscope uses two lenses at the same time to view objects-the objective lens, which gathers light and magnifies the image of the object, and the ocular lens, which one looks through and which further magnifies the image.
A compound light microscope uses two lenses at the same time to view objects-the objective lens, which gathers light and magnifies the image of the object, and the ocular lens, which one looks through and which further magnifies the image.
What is an example of a simple microscope?
A magnifying glass
What is the smallest amount of space a specimen can be seen with a microscope?
A microscope can see spaces between objects that are closer together than 0.1mm.
What four things did Anton van Leeuwenhoek discover?
1) He discovered red corpuscles that give blood it's color. 2) He discovered tiny bacteria. 3) He discovered tiny animalcules 4) He was the first to see blood moving through veins and arteries.
A slide one wants to view is placed on the stage of a microscope. On some microscopes, stage clips on the stage hold the slide in place so it doesn't slip. Our microscopes have mechanical stages. There is a lever that keeps the slide in place, and there are knobs on the left side of the stage that control the movement of the slide.
A slide one wants to view is placed on the stage of a microscope. On some microscopes, stage clips on the stage hold the slide in place so it doesn't slip. Our microscopes have mechanical stages. There is a lever that keeps the slide in place, and there are knobs on the left side of the stage that control the movement of the slide.
What are compound microscopes good for viewing?
Compound microscopes are great for viewing cells and protists.
Compound microscopes have two, three, or four objective lenses. The low-power lens on our microscopes magnifies 4X, the medium power-power lens magnifies 10X, and the high-power lens magnifies 40X.
Compound microscopes have two, three, or four objective lenses. The low-power lens on our microscopes magnifies 4X, the medium power-power lens magnifies 10X, and the high-power lens magnifies 40X.
Light for viewing a specimen is eithr gathered using a mirror or produced dy a lamp. These are both called illuminators. it is necessary that light pass through a specimen in order to see it under a compound microscope; therefore, the light source is positioned below the slide. if the specimen is too thick, no light will be able to penetrate it, and a viewer will see only blackness.
Light for viewing a specimen is eithr gathered using a mirror or produced dy a lamp. These are both called illuminators. it is necessary that light pass through a specimen in order to see it under a compound microscope; therefore, the light source is positioned below the slide. if the specimen is too thick, no light will be able to penetrate it, and a viewer will see only blackness.
The amount of light that strikes the slide can also be controlled by the diaphragm which is a camera shutter-like device that can increase or decrease the size of the opening in the stage. If it is opened wide, more light will hit the slide, and more light will be seen by the viewer.
The amount of light that strikes the slide can also be controlled by the diaphragm which is a camera shutter-like device that can increase or decrease the size of the opening in the stage. If it is opened wide, more light will hit the slide, and more light will be seen by the viewer.
The body tube is the part of the microscope that connects the eyepiece to objectives. It keeps them the correct distance apart so that focusing the image is possible. it also allows light to pass to the ocular lens.
The body tube is the part of the microscope that connects the eyepiece to objectives. It keeps them the correct distance apart so that focusing the image is possible. it also allows light to pass to the ocular lens.
The fine adjustment knob is used to focus at high power. Although it also moves the stage, it moves it such a tiny distance, the movement cannot be seen.
The fine adjustment knob is used to focus at high power. Although it also moves the stage, it moves it such a tiny distance, the movement cannot be seen.
What happens if the resolving power or resolution of a microscope is not that good?
The image will appear blurred and out of focus.
What did the invention of a microscope allow to happen?
The invention of the microscope made it possible for people to discover and learn about cells.
The revolving nosepiece is a disk that holds the objectives and which can be turned in order to change from one objective to another. If an objective is not quite clicked into place, no light will be able to reach the ocular lens.
The revolving nosepiece is a disk that holds the objectives and which can be turned in order to change from one objective to another. If an objective is not quite clicked into place, no light will be able to reach the ocular lens.
The total magnifying power of a microscope is the product of the magnifying power of the lens in the eyepiece (the ocular) and the magnifying power of the lens in the objective.
The total magnifying power of a microscope is the product of the magnifying power of the lens in the eyepiece (the ocular) and the magnifying power of the lens in the objective.
What are stereoscopic microscopes good for viewing?
They are good for viewing something in 3D.
What are electron microscopes good for viewing?
They are good for viewing viruses or parts of a cell
How are simple microscopes held?
They are usually held in the hand and mobile (movable)
When people say microscope, which type of microscope are they referring to? Why does it have this name?
They are usually referring to compond microscopes. They are called compund microscopes because they are made of several glass lenses in a tube.
When were simple microscopes used by scientists?
They were used in the 17th century to discover something.
How much can a compound microscope magnify a specimen?
Up to 400 times its real size.
