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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
Which of the following are used for studying rocks with a polarizing microscope?
- Thin sections: A thin slice of rock mounted on a glass slide.
- Cross-polarized light: Two polarizing filters that allow observation of mineral properties like birefringence and color under a microscope.
What are a few facts about the microscope?
Microscopes are used to see objects too small for the human eye.
One of the first microscopes was made in 1590 by Zaccharias and Hans Janssen.
Galileo later improved their invention in 1609.
Three types of microscope:
-Optical (uses visible light wavelengths)
-Electron (uses electrons to magnify the object)
-Scanning probe (uses a physical probe)
What are the 20 different types of microscope?
Optical Microscopes
Compound Microscope
Stereo Microscope
Confocal Laser scanning microscope
X-ray Microscope
Scanning acoustic microscope (SAM)
Scanning Helium Ion Microscope (SHIM or HeIM)
Neutron Microscope
Electron Microscopes
Transmission electron microscopy (TEM):
Scanning electron microscopy (SEM)
Scanning Probe Microscopes:
- Place slide on stage and stabilize w/clips
- Center slide on stage
- Lowest-power objective lens is in place
- Decrease between stage and tip of objective lens
- Focus with coarse and fine knobs
What is belief adjustment model?
The belief adjustment model is a psychological theory that explains how people update their beliefs based on new information. It suggests that individuals start with an initial belief, then modify this belief when presented with new evidence. This model is commonly used in research on decision-making and cognitive processes.
What is scanning process of documents and images?
The scanning process includes: 1) Placing the document on the glass plate and closing the cover. 2) A lamp is then used to illuminate the document.3) By clicking the scan button, the scan process will automatically begin.
What type of microscope did van Leeuwenhoek create?
Simple Answer:
Anton van Leeuwenhoek made innovations to the simple microscope with a single lens. His microscopes received no special name and were enhancements of the "simple microscope."
Anton van Leeuwenhoek always referred to his instrument as a Vergroot-glas, which translates into magnifying glass.
He also enhanced the overall design of the simple microscope and specimen holder. He constructed at least 25 different designs of the simple microscope. (He rarely used the compound microscope which had been invented 40 years before his birth because his simple microscopes had far greater magnification.)
More:
Though Anton van Leeuwenhoek did not invent the microscope, he did make a great discovery. About 1670, he found that he could form tiny glass beads that were nearly perfect spheres and also capable of high magnification when used in a simple microscope. Indeed, his little glass spheres could magnify an object 250 times (perhaps more), about ten times better than the best compound microscopes of the day.
Beyond the discovery of the methods for making small spherical lenses, van Leeuwenhoek also built microscopes and experimented with their design, addressing the difficult problems of illuminating, holding and viewing the specimens.
He made over 500 optical lenses, though they did not necessarily go into 500 different microscopes. The microscopes themselves were expensive and time consuming to construct, but records indicate possibly as many as two hundred were made. In this process he is said to have created at least 25 variations on the basic design of the microscope.
Only nine of his microscopes are known to exist today.
What are three limitations of a electron microscope?
- Limited depth of field: Electron microscopes have a narrow depth of field, making it challenging to focus on three-dimensional samples.
- Sample preparation: Samples for electron microscopy need to be placed in a vacuum and coated with a conductive material, which can distort the natural structure of the sample.
- High cost and maintenance: Electron microscopes are expensive to purchase, maintain, and operate, requiring specialized training and expertise.
Explain what the microscope user may have to do to combat the problems incurred?
The user would have to adjust the diaphragm to let in more or less light for their needs.
What type of specimens can be viewed under a SEM?
A scanning electron microscope (SEM) can be used to view a wide range of specimens including metals, minerals, ceramics, plastics, biological samples, and some polymers. These specimens can be studied at high magnifications and provide detailed information about their surface topography and composition.
A living thing that is so small it can only be seen with a microscope?
A microorganism, such as bacteria or protists, are living things that are too small to be seen with the naked eye and require a microscope to observe. These tiny organisms play vital roles in various ecosystems, such as recycling nutrients and breaking down organic matter.
What type of microscope do scientists use to observe small living organisms?
Scientists use a compound light microscope to observe small living organisms. This type of microscope uses visible light and multiple lenses to magnify samples for observation. It is commonly used in biology and microbiology studies.
What is the name for part of theatre and a part of a microscope?
The name for a part of theatre and a part of a microscope is "stage." In theatre, the stage is where actors perform, while in a microscope, the stage is the platform on which the slide is placed for viewing.
Why must you be careful when lowering the coarse adjustment knob on a microscope?
Depending on the lens choice, the lens may need to be very close to the sample to focus. This is especially true with the higher magnifications.
You don't want to smash the lens into your sample, damaging the sample and the lens.
How did the compound microscope get its name?
The compound microscope got its name because it uses multiple lenses (a combination or compound) to magnify the object being viewed. This design allows for higher magnification and a greater level of detail than a single-lens or simple microscope.
How has the microscope affected lives of everyday people?
it helped us find out about bacterias and how we have colds
How has the microscope allowed scientists to discover new ideas about science?
microscopes have helped scientists to dicover cells and discover their functions. they have helped scientists examine the anatomy of tiny organisms and insects, and inspect organs of all species more closely.
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How can the microscope become an extension of your senses?
The microscope can become an extension of your sense of vision because, when you look through it, it lets you see very small things close up.
What are two main types of electron microscope's and how are they diff?
TEMs - Transmission Electron Microscopes
SEMs - Scanning Electron Microscopes
The main difference in the two are that TEMs give a two dimensional image by having electrons penetrate through the specimen, where as SEMs give a three dimensional image by staining the specimen with a dense material, IE : Gold, and firing electrons at it and letting them bounce off.
How have microscopes change science?
They basically allowed us to observe micro organisms and started the field microbiology.
