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What should you do first to bring the object in focus on a microscope?
Never touch the very small dial first. You want to work your way from big to small on the dials. The very large one had a broad focus, and as you get smaller, the focus is clearer
How can you carry a microscope?
You need to hold the neck with one hand and the base with the other hand. Never hold the arms or else it will break.
Why should magnets never be heated hammered or dropped?
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Why should you never slide fast down a rope?
your hands will burn
What limits the resolving power of a light microscope?
== == When using a light microscope you encounter diffraction. (Visible light behaves like a wave, with a wavelength of about 300 to 900 nanometres). We say that light diffracts when its wavelike behaviour makes it bend around obstacles, or spread out. If the obstacle is much larger than the wavelength of the incoming wave, the spreading-out will be smaller. If the gap is smaller than the wavelength, then the spreading-out will be very large. In a light microscope, the light waves will spread out whenever they pass through a lens, or any sort of obstruction. The primary lens in most microscopes is of much bigger than 300-900 nanometres, so the angle by which light waves diverge is really quite small. However, it is not zero the light waves do spread out a little bit, and the result is that the visual field is always a bit blurry. It is impossible for an ordinary light microscope to avoid this problem, so they can never see structures smaller than about 500 nm.
Give you some rules for taking care of a microscope?
Do not touch lenses. ALWAYS start with the least magnification, and work upwards. Clean slides and microscope when finished with it. Cover microscope with dust cover when not in use. Never swing the microscope.
What is the only material that should be used to clean the lenses of a microscope?
The first step to clean a microscope lens is to take some lens cleaning paper that you can find in specialty shops or distributors of laboratory equipment. Alternatively, use certified cotton. Never touch the microscope lens with your fingertips since fingerprints can affect the microscope's visibility.
How often do you change Proclear Contact Lens?
Proclear lenses, made by CooperVision, are one month contact lenses, and should never be used to sleep in.
The coarse adjustment knob on a microscope should never be used with the?
high-power lens
Which two pieces from the microscope should you never touch?
is it you shouldn't touch chemicals with your hands
If an object can be magnified 100 200 or 1000 times when viewed under a microscope does the objects actual size change with the magnification Explain why?
No, the actual size never changes - only the APPARENT size, due to the magnification provided by the lenses of the microscope.
Is there any literature available on how to care for glasses with Anti-Reflection Coatings?
Some lens manufacturers will send out leaflets to optical practices containing advic on ho to care for their lenses so you ask at your local Opticians. The main thing to remember if you have anti-reflective lenses is that they should never be cleaned with soap, washing-up liquid or any other kind of detergent. This can break down the coatings on the lens. Ideally you should use a specialised lens cleaner (available from most optical practices) but be sure to check that it is suitable for anti-reflective lenses. Spray both sides of the lenses and gently rub dry with a lint free cloth. If you don't have lens cleaner, use water. Under a running tap, rub the lenses with your fingers and gently dry with a lint free cloth. Never use your clothes to wipe your lenses. As with all lenses, they will scratch if left lens-down on a surface and you should always keep you glasses in a case to protect them when you're not wearing them.
What should you do if you have 100 fingers?
Keep them in a jar to stop them rotting. You never know when you might need them,
We can sleep with eye lencis?
No, a person should never sleep with contact lenses in their eyes. It can cause infections and other serious problems.
Why was JKepler famous?
Johannes Kepler(1571-1630), suggested in 1611 that using convex lenses within the eye piece and a convex lens in the objective would help improve the image. However, he never attempted to make this microscope.
What is the function of an eyepiece lens on a microscope?
Eyepiece is the lens through which we observe the specimen in a microscope. It multiplies and adjusts the magnification of the objective lenses. Sometimes, it even corrects aberrations of the objective lens.
Contributions of Anton van leeuwenhoek?
A very early and visually precise microscope using a drop method to get very fine lenses for grinding. His microscopes were much better that Hooke's and he discovered small organisms that had never been seen before.
