when ever you lose sight of your specimen,you should always look for it at a low
ID: 12091 • Letter: W
Question
when ever you lose sight of your specimen,you should always look for it at a lower power .why is this?what is the significance of the numbers followed by an "X" on the eyepiece and each objective? what does "10X' or "15X means"?
what is the major disadvantage of observations made with the electron microscope?
what is the maximum magnification obtainable with light microscope?With the electron microscope?
why is anatomical position chosen as the standard?
How would you tell a child ,in non-technical language to stand this way(in anatomical position)?
which section of the body produces a "side view"
Explanation / Answer
Looking at it under a lower power enlarges the field of view and makes it easier to find the specimen again. The numbers state how many times over the magnification is. For example, if your microscope is on the 4X objective, the total magnification will be 40X what the naked eye can see. The reason it is 40X is because the eyepiece lens is 10X magnification automatically, so multiply 10 times whatever the objective is. So 10 times 10X equals 100 times what the eye can see and so on. It takes a lot of work to get a specimen properly prepared to be viewed under an electron microscope. The specimen must be in a vacuum and coated with a metal film. Then after all that, the specimen must be sliced very thinly to allow the electrons to pass through it, so it can't be alive anymore. Light microscopes max out at 1500X. Electron microscopes max out at 500,000X if you are using a transmission electron microscope (TEM). It's the standard (for humans at least) because it is a relaxed position that has the body completely lined up. It was a common set up for cadavers in olden days and continues to be so today. Stand with your feet together, your arms out slightly away from your body, with your palms forward. The median or saggital plane Hope that all helps
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