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∙ 14y ago
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How can you get a specimen under a microscope to focus under the higher powered lenses without crashing the slide?
Look sideways at the slide table. SLOWLY lower the tube until it just touches the slide on the slide table. Then look through the eyepiece and SLOWLY focus BACKWARDS. That's your best bet.
When clinking glasses you should always look the other person in the eye but in which country?
iran
Who discovered a microscope?
During the 1st century AD (year 100), glass had been invented and the Romans were looking through the glass and testing it. They experimented with different shapes of clear glass and one of their samples was thick in the middle and thin on the edges. They discovered that if you held one of these "lenses" over an object, the object would look larger. Someone also discovered that you can focus the rays of the sun with one of these special "glasses" and start a fire. These early lenses were called magnifiers or burning glasses. The word lens by the way, is derived from the latin word lentil, as they were named because they resembled the shape of a lentil bean (look up lens in a dictionary). These lenses were not used much until the end of the 13th century when spectacle makers were producing lenses to be worn as glasses. The early simple "microscopes" which were really only magnifying glasses had one power, usually about 6X - 10X . One thing that was very common and interesting to look at was fleas and other tiny insects. These early magnifiers were hence called "flea glasses". Sometime about the year 1590, two Dutch spectacle makers, Zaccharias Janssen and his father Hans started experimenting with these lenses. They put several lenses in a tube and made a very important discovery. The object near the end of the tube appeared to be greatly enlarged, much larger than any simple magnifying glass could achieve by itself! They had just invented the compound microscope (which is a microscope that uses two or more lenses). Galileo heard of their experiments and started experimenting on his own. He described the principles of lenses and light rays and improved both the microscope and telescope. He added a focusing device to his microscope and of course went on to explore the heavens with his telescopes. Anthony Leeuwenhoek of Holland became very interested in lenses while working with magnifying glasses in a dry goods store. He used the magnifying glass to count threads in woven cloth. He became so interested that he learned how to make lenses. By grinding and polishing, he was able to make small lenses with great curvatures. These rounder lenses produced greater magnification, and his microscopes were able to magnify up to 270X! Anthony Leeuwenhoek became more involved in science and with his new improved microscope was able to see things that no man had ever seen before. He saw bacteria, yeast, blood cells and many tiny animals swimming about in a drop of water. From his great contributions, many discoveries and research papers, Anthony Leeuwenhoek (1632-1723) has since been called the "Father of Microscopy". Robert Hooke, an Englishman (who is sometimes called the "English Father of Microscopy"), also spent much of his life working with microscopes and improved their design and capabilities. Little was done to improve the microscope until the middle of the 19th century when great strides were made and quality instruments like today's microscope emerged. Companies in Germany like Zeiss and an American company founded by Charles Spencer began producing fine optical instruments. Today, there are no microscope manufacturers in the US and most of the microscopes come from Germany, Japan and China. Toy plastic microscopes should be avoided as they do not achieved the level of quality of the basic instruments with metal frames and glass lenses. Because of foreign production, quality microscopes have become affordable for all. Zaccharias Janssen, the inventor of the microscope would marvel at the quality of even the most basic microscopes found in schools today.
Does it ruin your eyes to look through rose colored glasses?
No, the person wearing them shouldn't have problems.
What is better contacts or glasses?
It depends on your prescription and where you are shopping. The more complicated your prescription is, whether it be glasses or contacts, the higher the cost will be. The cost also depends on if you are going to a optometrist office (more expensive with higher quality products) or a corporate chain (less expensive with lower quality products) to buy your glasses. Contact lenses are the same quality no matter what store you buy them at as long as they are not expired. On line contact lens wholesalers are usually the cheapest.
Are Sarah Palin's glasses prescription or fake clear lenses?
They are planos glasses I think, you can see it when you look through them.
What does pitbull look like without the big glasses?
How does pitbull look like without his glasses
What is the name of glasses with no lenses?
There is no official name, but glasses that serve no function to aid in sight are generally called "vanity glasses." Vanity glasses are sold in a variety of fashion stores, like Hot Topic and Urban Outfitters. They tend to be sold with clear lenses to look "real." You can pop the lenses out if you don't want them. It is also common for people to take the 3D glasses that are given out at movie theaters, pop the lenses out, and wear them like that.
How does prodigy look without glasses?
Prodigy look so cute,with out his glasses
Did Kurt Cobain need prescription glasses?
Not really. He wore an old pair of Buddy Holly-like glasses without any lenses for a couple of photo shoots and then for fun. But then threw them away when somebody told him that when he wore them he looked like his dad.
Why do snails look like they are wearing glasses?
Because their eyelids are weird, and kind of magnifying.
Can a girl look pretty in glasses?
Absolutely you can wear glasses just for cosmetic reasons. You can get non-prescription lenses made. These are called plano lenses when no Rx is in lenses. It's not much different that having sunglasses without a prescription-- you just don't have the tinted lenses. Many people like to change their looks by wearing glasses with plano lenses. Fashion frames are quite common today. You can change your clothes, shoes, purses, make-up to suit your mood-- so why not glasses. Have fun with with fashion frames to give yourself an easy makeover. I would recommend someplace inexpensive to get the lenses like a walmart vision or something like that. Frames can be purchased at so many boutique shops, and even online. So bring your fave frame to your preferred optician and change your disposition, and your looks :-)
What does wwe umaga look like without braids?
if you can find a video from the 2007 hall of fame induction ceremony, when the camera goes on john cena, pause and look to the left side of the screen. the guy in the dark glasses is umaga without the paint. weird
Why is Erik Fisher so mean to Paul Fisher?
Because of his huge glasses that makes him look weird.
Why do eyes look small without glasses?
cuz
How does boogieman look without paint on his face?
weird
Why does microscope have lenses?
The lenses serve to enlarge the object you want to study. Without them, you might as well look through a toilet roll.
