Microscope Flashcards
one of the most recognizable symbols of science
microscope
“micro” = ?; “scope” = ?
small ; to look at
Photographs of cells are taken using a microscope, and these pictures are called
micrographs
Examining cells, tissues, and microorganisms to study their
structure and function
Biology
Diagnosing diseases by analyzing tissue samples (biopsies), blood smears, or
other biological specimens.
Medicine
Studying the microstructure of materials like metals, crystals, or polymers.
Material Science
Analyzing tiny evidence samples, such as fibers or hair, in criminal investigations
Forensics
Year first compound created
1590
credited with making one of the earliest compound microscopes (ones that used two lenses) around 1600.
Zacharias Janssen
coined the term “cell” by observing cork cells
Robert Hooke
What did Hooke saw in cork cells
He saw cell walls of dead plant
cells from bark. Saw “row of empty boxes”
Father of Microbiology
Anton Van Leeuwenhoek
Up to what magnification did Leeuwenhoek’s microscope reach in the year 1600s?
300x
He drew bacteria in plaque removed from his teeth. These are the first known observations of bacteria.
He called them as -
animalcules
Types of Microscope
Light Microscope
Electron Microscope
Flourescence Microscope
Uses visible light and a series of lenses to magnify objects.
Light microscope
Types of light microscope
Compound microscope
Stereomicroscope (Dissecting Microscope)
Uses a beam of electrons instead of light to achieve much higher magnifications, up to millions of times. Used to observe VERY small objects: viruses, DNA, parts of cells
Electron Microscope
Types of Electron microscope
Transmission Electron Microscope (TEM)
Scanning Electron Microscope (SEM)
The most common type, which uses multiple lenses to achieve high magnification, typically up to 1000x. It’s used to view thin sections of specimens like cells and tissues. Light passes through 2 lenses.
compound microscope
Provides a three-dimensional view of larger specimens at lower magnifications, typically used for dissection or examining the surface of objects.
Stereomicroscope/Dissecting microscope
Provides detailed images of the internal structure of thinly sliced specimens by transmitting electrons through them. Can magnify up to 250,000x
TEM
Produces detailed three -dimensional images of the surface of specimens by scanning them with a focused beam of electrons. Can magnify up to 100,000x
SEM
Uses fluorescence and phosphorescence instead of, or in addition to, reflection and absorption to study properties of organic or inorganic substances. It’s often used in biological research to view specific components within cells.
fluorescence microscope