Cell Theory and Types of Microscopes

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What is Cell Theory?

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Cell Theory states that: 1) All living things are made up of cells, 2) Cells are the basic unit of life, 3) All cells come from pre-existing cells.

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What is a Compound Light Microscope?

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A Compound Light Microscope uses visible light and a system of lenses to magnify images of small samples, typically providing magnification from 40X to 1000X.

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What is a Dissecting Microscope?

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A Dissecting Microscope, also known as a stereomicroscope, provides a lower magnification (4X-100X) and is used for viewing larger, three-dimensional specimens.

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What is a Transmission Electron Microscope (TEM)?

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A Transmission Electron Microscope (TEM) uses electrons to create high-resolution images of thin specimens, providing the highest magnification possible.

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What is a Scanning Electron Microscope (SEM)?

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A Scanning Electron Microscope (SEM) scans the surface of a specimen with a focused beam of electrons, providing detailed three-dimensional images.

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Who is Robert Hooke?

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Robert Hooke was a scientist who first observed and named 'cells' in cork in 1665.

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What is the total magnification formula?

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Total magnification = Eyepiece magnification x Objective lens magnification.

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Calculate the total magnification if the eyepiece is 10X and the objective lens is 40X.

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Total magnification = 10X * 40X = 400X.

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What does SEM stand for?

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SEM stands for Scanning Electron Microscope.

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What is the function of the eyepiece in a microscope?

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The eyepiece, or ocular lens, is the lens you look through to see the magnified image, typically providing 10X magnification.