Essay about microscope and it’s steps
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Essay about microscope and it’s steps
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Answer:
The word microscope comes from two Greek words, micro meaning small and scope meaning to see. Microscope are instruments used to enhance our vision to see things that are to small to see with the naked eye. The first forms of microscopes were lenses used by an English scientist named Roger Bacon who wrote about using them to magnify things.
The first actual microscope was made and used by a Dutch naturalist named Anton van Leeuwenhoek that magnified about 200 times. In about 1674 he said that he had seen little animals. This invention of the microscope was also the invention of microbiology.
The microscope has come a long way since Bacon and Leeuwenhoek. There are many different types of microscopes the ones Bacon and Leewunwenhoek had were light microscopes that use lenses and light to see whatever they are trying to see. The first compound light microscope was made by Hans and Zacharias Janssen in 1590 this microscope had two separate lenses, but it was not very powerful. Since then many people have made improvements on the microscope, even our old friend from integrated science H the astronomer Johannes Kepler had a few thoughts on a better design. The light microscope is mainly used in the fields of biology and medicine.
Also since then new ideas for different microscopes have come along. In 1932 the phase-contrast microscope was invented by Frits Zernike to help biologist examine living material without having to stain which sometimes killed the material. In the 1800 s the first polarizing microscopes were developed to study crystals. Another microscope that is very useful, not that the others aren t, is the stereomicroscope that show things in three dimensions. These microscopes are used to study things like fleas that are too small for the eye but too large for medical microscopes.
Explanation:
Step 1: Connect the light microscope to a power source. If your microscope uses a mirror instead of an illuminator, you can skip this step. Instead, find a place where natural light is easily accessible
Step 2: Turn the revolving nosepiece so the lowest objective lens is in position.
Step 3: Mount your specimen onto the stage. But before doing so, see to it that your specimen is adequately protected by placing a coverslip on top of it.
Step 4: Use the metal clips to keep your slide in place. Make sure the specimen is positioned in the center, right under the lowest objective lens.
Step 5: Look into the eyepiece and slowly rotate the coarse adjustment knob to bring your specimen to focus. See to it that the slide does not touch the lens.
Step 6: Adjust the condenser for the maximum amount of light. Since you're on the low power objective, you may have to decrease the illumination. Use the diaphragm under the stage to adjust.
Step 7: Now slowly rotate the fine adjustment knob until you obtain a clearer image of your specimen.
Step 8: Examine your specimen.
Step 9: After you're done viewing with the lowest power objective, switch to the medium power objective and re-adjust the focus with the fine adjustment knob.
Step 10: Proceed to the high power objective once you have it focused.
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