bi4 - Ch. 2 Cells Section 2: Viewing Cells Pages 47 - 51...

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Ch. 2 “Cells” Section 2: “Viewing Cells” Pages 47 - 51
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EARLY MICROSCOPES Zacharias Janssen - made 1st compound microscope a Dutch maker of reading glasses (late 1500’s )
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Leeuwenhoek made a simple microscope (mid 1600’s ) magnified 270X Early microscope lenses made images larger but the image was not clear
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Leeuwenhoek's microscope A) a screw for adjusting the height of the object being examined B) a metal plate serving as the body C) a skewer to impale the object and rotate it D) the lens itself, which was spherical
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MODERN MICROSCOPES A microscope is simple or compound depending on how many lenses it contains A lens makes an enlarged image towards you eye
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A simple microscope has one lens Similar to a magnifying glass Magnification is the change in apparent size produced by a microscope
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COMPOUND MICROSCOPE A compound microscope has multiple lenses (eyepiece lenses)
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STEREOMICROSCOPE creates a 3D image
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TOTAL MAGNIFICATION Powers of the eyepiece (10X ) multiplied by objective lenses determine total magnification.
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bi4 - Ch. 2 Cells Section 2: Viewing Cells Pages 47 - 51...

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