Lab Practical 1 Answers – Flashcards
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stereomicroscope and the scanning electron can view
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surface and or three dimensional of an object
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compound light microscope and transmission electron microscope view
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extremely thin sections of a specimen
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what is a longitudinal section cut
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a lengthwise cut through any type of specimen
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what is a cross section cut
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a crosswise cut through any type of specimen
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are biological objects small or large
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small
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light microscope uses
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visible light rays magnified and focused by lenses
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stereomicroscope studies
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entire objects in 3d and low magnification
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compound light microscope used
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for examining small or thinly sliced sections of an object under higher magnification
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compound refers to
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use of two sets of lenses
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photomicrograph
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photograph of an image produced by compound light microscope
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stains or dyes that bind to cellular structures and absorb light
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microscopist
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minium distance between two objects at which they can still be seen or resolve
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Resoilution
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do small organisms require low or high magnification
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low magnification
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compound light microscope are
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parfocal
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once the object is in focus with the lowest power, it should also be in focus with the higher power
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parfocal
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how is total magnification calculated
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mutiply magnification of ocular lens by the objective lens magnification
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what is a microscopes field of view
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the circle visible through the lens
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what type of microscope would you use to view a Euglena swimming in pond water
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compound light microsscope
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what are ocular lenses
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eyepiece
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which part of a microscope controls the amount of light
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diaphram
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what word is used to indicate that if the object is in focus at low power it will also focus in high power
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parfocal
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what adjustment knob is used with high power
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fine adjustment knob
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if euglena is swimming to the left, which way should you move the slide
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right
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what is the final item placed on a wet mount before viewing with a light microscope
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coverslip
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what type of object do you study with a stereomicroscope
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entire object
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why is a stereomicroscope also called a binocular dissecting microscope
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each microscope receive its own magnified image and provides depth of field for viewing objects
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a virus is 50 nm in size, what type of microscope should be used
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scanning electron is below the frequency of light
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what advantages does the metric system provide over english units of measure
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1. its easier for some to convert 2. also more accurate
