compound microscope
the compound/compound light microscope is a microscope that uses lenses and a light source to magnify the specimen/
The compound light microscope is the most common and versatile type of microscope today. It is easy to use and relatively inexpensive./
.Magnification refers to how much a specimen is enlarged in appearance/
In microscopy, magnification of a specimen is achieved using a lens system/
Magnification is a number that tells you how much bigger a magnifying glass makes things look. For example, a 2x magnifying glass makes things look twice as big./
Compound microscopes use two lenses to magnify specimens: an ocular lens and an objective lens. The ocular lens magnifies 10 times, and the objective lenses magnify 4, 10, or 40 times./
The total magnification is determined by multiplying the magnification of the ocular lens by the magnification of the objective lens being used/
Always keep the microscope upright when handling it. Use two hands to carry the microscope—one under the base and one on the arm. Place the microscope near the centre of the desk or able where it will be used./
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Be careful when handling glass slides—they may shatter if dropped./
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When sunlight is used for illumination, ensure that the Sun cannot be focused directly through the microscope./
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When you are observing a specimen through the microscope, keep both eyes open to avoid straining your eyes./
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Always store the microscope with the lower-power objective lens in place and the stage lowered. This will prevent the objective lens from being accidentally scratched by the slide when you begin using the microscope./
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Only use the coarse-adjustment knob with low-power objective lenses. Use the fine-adjustment knob at higher powers./
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Use the microscope in a dry area. Your hands should also be dry when using a microscope./
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Remember to unplug the microscope from the electrical outlet by grasping and pulling the plug, not by pulling on the power cord./
Coil the power cord neatly around the arm of the microscope when returning the microscope to its storage area./
The microscope should be carried with one hand under the base and one hand on the arm./
.The field of view is the circular area you see when you look through a microscope./
The field of view gets smaller and the specimen appears larger as you use more powerul lenses./
Scientists draw what they see through the microscope in a circle. They label the total magnification and use straight lines to label structures./
Biological drawings are simple, two-dimensional drawings with stippling ( dots) instead of shading./
Microscopes helped us see cells and understand our health and the environment./