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Microscopes
Microscopes are used to look at things that are not visible to the naked eye. This category would demonstrate how microscopes work and information about different kinds of microscope.
4,322 Questions
What did Robert hooke discover with a microscope?
Robert Hooke discovered and described cells in 1665 when he observed cork under a microscope. He coined the term "cell" to describe the small compartments he saw, which resembled the cells of a monastery. This discovery laid the foundation for the field of cell biology.
A microscope that uses electrons to examine a specimen is called a what?
A microscope that uses electrons to examine a specimen is called a transmission electron microscope (TEM). It has a higher magnification and resolution compared to light microscopes, allowing for detailed viewing of subcellular structures and particles.
What did robert hooke discover with his microscope?
Robert Hooke discovered and coined the term "cell" after observing the small structures in cork under his microscope. He also made other important biological observations, such as the structure of fossils and plant anatomy.
What proof do you now have that living things are similar when viewed through a microscope?
When viewed through a microscope, living things share common structures such as cells, organelles, and genetic material. These similarities suggest a common evolutionary origin and fundamental biological processes that are conserved across different species. Studying these similarities helps scientists understand the interconnectedness of life on Earth.
What are the advantages of using a microscope?
A microscope allows for magnifying small objects, enabling detailed observation at a microscopic level. This can help in scientific research, medical diagnosis, quality control in manufacturing, and various other fields where the fine details are important. Additionally, microscopes can reveal structures and phenomena that are not visible to the naked eye, providing deeper insights into the world around us.
What is the effect of microscope on people life?
Without the microscope we wouldn't know as much about cells as we do now with microscopes and we probably would be more prone to sickness considering that sickness has to do with cells fighting against virus' and the cure is hidden with the factors of the cell.
Who was the first person to see microorganisms under a microscope?
The first person to see microorganisms under a microscope was Antonie van Leeuwenhoek, a Dutch scientist, in the 17th century. He is often considered the father of microbiology for his groundbreaking observations of bacteria, yeast, and other microorganisms.
What are 10 facts about microscopes?
1. Yes
2. no
3. They are to view small things
4. Matthew Mooney obviously discovered them
5. Do u remember Hugh Pat?
6. their special move is the laser punch
7,8,9 & 10 they are all sluts
Can i see Sperm under microscope?
Yes, sperm cells can be seen under a microscope. They are typically stained with a dye to make them more visible. Sperm cells are very small, measuring about 5 micrometers in length, so a high-powered microscope is needed to observe them clearly.
What are the Function of magnifying parts?
Body - The frame of the microscope.
Body tube - Inside "tunnel" of the microscope.
Eyepiece - Where you look.Objective - That is the lens closest to the specimen.
Focus fine tuning knob - Allows you to focus the image at a smaller, finer rate.
Focus knob - Allows you to focus the image.
Ocular lens - That is the lens in the eyepiece.
Slides - Used for holding specimens.
Specimen - What you are viewing.
Stage - That is where the slide goes.
Stage clip - That is a clip or spring for holding the specimen slides.
Turret - Part that allows you to change objectives.
A microscope is a scientific instrument that magnifies objects that are too small to be seen by the naked eye. It allows scientists and researchers to study minute details of cells, tissues, microorganisms, and other tiny structures. Microscopes are essential tools in fields such as biology, medicine, chemistry, and materials science.
Microscope is important because it enables us to observe the tiniest things in our world that we cannot see in our naked eye. It is also one of the instruments used in making new medicines, further research in any fields of science,and etc.
What are the parts of a microscope and what do they do?
Eyepiece Lens: the lens at the top that you look through. They are usually 10X or 15X power.
Tube: Connects the eyepiece to the objective lenses
Arm: Supports the tube and connects it to the base
Base: The bottom of the microscope, used for support
Illuminator: A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage.
Stage: The flat platform where you place your slides. Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it up and down.
Revolving Nosepiece or Turret: This is the part that holds two or more objective lenses and can be rotated to easily change power.
Objective Lenses: Usually you will find 3 or 4 objective lenses on a microscope. They almost always consist of 4X, 10X, 40X and 100X powers. When coupled with a 10X (most common) eyepiece lens, we get total magnifications of 40X (4X times 10X), 100X , 400X and 1000X. To have good resolution at 1000X, you will need a relatively sophisticated microscope with an Abbe condenser. The shortest lens is the lowest power, the longest one is the lens with the greatest power. Lenses are color coded and if built to DIN standards are interchangeable between microscopes. The high power objective lenses are retractable (i.e. 40XR). This means that if they hit a slide, the end of the lens will push in (spring loaded) thereby protecting the lens and the slide. All quality microscopes have achromatic, parcentered, parfocal lenses.
Rack Stop: This is an adjustment that determines how close the objective lens can get to the slide. It is set at the factory and keeps students from cranking the high power objective lens down into the slide and breaking things. You would only need to adjust this if you were using very thin slides and you weren't able to focus on the specimen at high power. (Tip: If you are using thin slides and can't focus, rather than adjust the rack stop, place a clear glass slide under the original slide to raise it a bit higher)
Condenser Lens: The purpose of the condenser lens is to focus the light onto the specimen. Condenser lenses are most useful at the highest powers (400X and above). Microscopes with in stage condenser lenses render a sharper image than those with no lens (at 400X). If your microscope has a maximum power of 400X, you will get the maximum benefit by using a condenser lenses rated at 0.65 NA or greater. 0.65 NA condenser lenses may be mounted in the stage and work quite well. A big advantage to a stage mounted lens is that there is one less focusing item to deal with. If you go to 1000X then you should have a focusable condenser lens with an N.A. of 1.25 or greater. Most 1000X microscopes use 1.25 Abbe condenser lens systems. The Abbe condenser lens can be moved up and down. It is set very close to the slide at 1000X and moved further away at the lower powers.
Diaphragm or Iris: Many microscopes have a rotating disk under the stage. This diaphragm has different sized holes and is used to vary the intensity and size of the cone of light that is projected upward into the slide. There is no set rule regarding which setting to use for a particular power. Rather, the setting is a function of the transparency of the specimen, the degree of contrast you desire and the particular objective lens in use
Antonie van Leeuwenhoek popularized the use of the microscope in the field of microbiology. He was a Dutch cloth merchant who was the first to observe bacteria and describe red blood cells. His discoveries laid the foundation for the field of microbiology and changed our understanding of the microbial world.
What are the disadvantages of fluorescence microscope?
Cannot provide spatial resolution below the diffraction limit of specific specimen features
http://www.microscopyu.com/articles/fluorescence/fluorescenceintro.html
A phase-contrast microscope differs from a brightfield microscope by having a?
Phase-contrast microscope utilizes phase shifts in light passing through a transparent specimen to enhance contrast, making transparent objects more visible without staining. Brightfield microscopes rely on absorption of light by the specimen to create contrast, typically requiring staining to visualize transparent specimens effectively.
How many microscopes did Robert hooke invent?
Robert Hooke is credited with inventing the compound microscope, which used a series of lenses to magnify images. He did not invent multiple microscopes, but his work in improving the design of the compound microscope contributed to advancements in the field of microscopy.
Why is cedar wood used with oil immersion objective?
Cedar wood is used with oil immersion objectives in microscopy because it has a refractive index similar to that of the oil (usually 1.515) used to fill the space between the objective lens and the specimen. This minimizes light scattering and improves image quality by increasing numerical aperture and resolving power.
How you could use a microscope determine whether the specimen is a living or non-living thing?
A microscope can help determine if a specimen is living by observing if it shows specific characteristics of living organisms like movement, growth, or reproduction. Additionally, the presence of organelles or cellular structures typical of living cells could indicate that the specimen is alive. On the other hand, if the specimen lacks these characteristics and appears inert or does not exhibit any cellular components, it is likely non-living.
What is mordant in z-n staining technique?
In Ziehl-Neelsen staining technique, a mordant such as heat or steam is used to enhance the binding of the primary stain (carbolfuchsin) to the acid-fast bacteria. The mordant helps the stain penetrate the waxy cell walls of acid-fast bacteria, improving the visualization of these organisms under the microscope.
What are the Magnifying parts and function of microscope?
The main magnifying parts of a microscope are the objective lens and the ocular lens. The objective lens magnifies the specimen being viewed, while the ocular lens further magnifies the image produced by the objective lens. Together, they help to achieve high magnification for detailed observation of microscopic structures.
You can find pictures of compound microscopes with labels for reference on educational websites, science textbooks, or online image databases. Websites like Biology Online or Science Direct offer resources for this purpose. Simply search for "compound microscope labeled diagram" in your preferred search engine to find suitable images.
3 main parts of compound microscope?
I. Illuminating part(s)
condenser
illuminator
diaphragm
II. Magnifying part(s)
Objectives: LPO - 10x
HPO - 40x / 60X
OIO - oil immersion objctive - 100x
III. Mechanical part(s)
arm
base
body tube
stage
rack stop
focusing knobs (fine adjusmnt and coarse adjustment)
dust shield
revolving nosepiece
inclination joint...
Some basic rules of using a microscope include: always start with the lowest magnification objective lens, gradually increase the magnification as needed, use the coarse and fine focus adjustment knobs to bring the specimen into sharp focus, keep the lenses and stage clean, and always carry the microscope with two hands to avoid damage.
