Electron Microscope
The electron microscope has become one of the most widely utilized instruments for materials characterization. An electron microscope is a scientific instrument that allows us to “see” objects so small that they cannot be seen in any other way. (CITE) Electron microscopes have allowed scientists to see individual molecules and atoms for the first time.
Most microscopes, including those in schools and laboratories today, are optical microscopes. They use glass lenses to enlarge, or magnify, an image. An optical microscope cannot produce an image of an object smaller than the length of the light wave in use. To see anything smaller than 2,000 angstroms (about 1/250,000 of an inch) a wave of shorter length would have to be used. In 1923, a French physicist Louis de Broglie suggested that electrons, like light, travel in a wave. In addition, the wavelength of electrons is much shorter than the wavelength of light.
An electron is an elementary particle carrying a unit of charge of negative electricity.
(CITE) J. J. Thompson discovered the electron in 1897 while showing what cathode rays were composed of. (CITE) The first time that the electron was used for a unit of negative electricity was in the late 19th century by the English physicist G. J. Stoney.
The electron is the lightest particle having a non-zero rest mass. Electrons also have a wavelike property, which made them prime candidates for microscopes and other devices.
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In history the pagans have been viewed as godless infidels. Many who practice paganism live in fear related to the judgment of others that hold differing views on religion. Much of the persecution of the Pagan has been related to their practice of magic. What is amazing is that much of the magic once practiced by pagans was similar to that of modern medicine (Some Basic Pagan, n.d.). Despite their apprehension and fear of persecution, it has been reported that Paganism has been described as one of the most rapidly growing religious movements in the world today (Eilers, p.
Everything is constantly changing over time and one of the things that has changed drastically is our society's view on Witchcraft. It started out as being a regular religion but was more negatively talked about as the years went by. Society’s view on Witchcraft never really changed but our morals as people did. We have accepted that it is a religion and
Ewald Georg von Kleist is a German scientist who created the capacitor in November of 1745. Regrettably, Kleist did not have the proper paper work to claim in the records that the design of the capacitor was his idea. Many months later, a Dutch professor named Pieter van Musschenbroek created the Leyden jar, the world’s first capacitor (on record). It was a simple jar that was half filled with water and metal above it. A metal wire was connected to it and that wire released charges. Benjamin Franklin created his own version of the Leyden jar, the flat capacitor. This was the same experiment for the more part, but it had a flat piece of glass inside of the jar. Michael Faraday was the first scientist to apply this concept to transport electric power over a large distance. Faraday created the unit of measurement for a capacitor, called Farad.
Wicca is an old religion, having begun “more than thirty-five thousand years ago” as stated by Starhawk, a Wiccan (qtd in Allen 18). Even though it had started long before him and many events involving witchcraft had happened, research has shown that a man named Gerald Gardner was the one who brought the religion of Wicca to the public eye in the 1950s (Allen 19). Gardner said it was thought to be the pre-Christian religion of Europe called the “old religion” (Adler 637). ...
Wicca is a spiritual path, a way of seeing the world and Divinity, and our relationship to it. They believe that Goddess is imminent in the world around us. Goddess permeates every living thing, and most of them define rocks, soil, water, air, fire, and the plant herself as living things. "The God of Wicca is the Horned God, the ancient God of Fertility: the God of the forest, flock, and field and also of the hunt." He is Lord of Life, and the Giver of Life, yet he is also Lord of Death and Resurrection. http://www.interlog.com/~spawn/gods.html
Apfeldorf’s article “Uncovering a Tiny World” discusses Hooke’s book which is known for its microscopic illustrations of insects and microbes that Hooke had drawn as he viewed them under the microscope. His elaborate drawings of tiny objects and insects were the scientific evidence that supported his claims of the significant value of the microscope to science and the many ways it could be used. The book also contained a description of how to make a powerful microscope with a spherical lens, much like Leeuwenhoek’s glass pearls. Leeuwenhoek traveled to England that same year and is believed to have obtained a copy of Hooke’s book and
To see a chemical at a microscopic level you would need to use a microscope versus the
The theory of quantum mechanics has divided the atom into a number of fundamental sub-atomic particles. Although the physicist has shown that the atom is not a solid indivisible object, he has not been able to find a particle which does possess those qualities. Talk of particles, though, is misleading because the word suggests a material object. This is not the intention for the use of the word in quantum physics. Quantum particles are, instead, representations of the actions and reactions of forces at the sub-atomic level. In fact, physicists are less concerned with the search for a material particle underlying all physical objects and more interested in explaining how nature works. Quantum theory is the means that enables the physicist to express those explanations in a scientific way.
The practices of witchcraft have been around for many centuries. It was said that men in early times used the idea of magic to pay respects to the gods that ruled and brought forth an easier life. Magic was used mostly by shamans, medicine people, and witches to call the powers of the gods to help grow crops and bring water. Magic was used more often when times were hard and grew from the craziness of bad weather and little food supplies. These people who performed witchcraft would do rituals and cast spells to help call the upon the gods. Over time the use of witches and witchcraft turned sour and people were seeing less and less of them. “Witches, who were primarily women, were originally seen as wise healers whom could both nurture and destroy; this belief in their power, however, eventually led to fear, and this often forced witches to live as outcasts” (Ashforth, 2005).
The Electric Franklin. "Benjamin Franklin's Inventions." Ushistory.org. Independence Hall Association, 4 July 1995. Web. 23 May 2014.
Scientists from earlier times helped influence the discoveries that lead to the development of atomic energy. In the late 1800’s, Dalton created the Atomic Theory which explains atoms, elements and compounds (Henderson 1). This was important to the study of and understanding of atoms to future scientists. The Atomic Theory was a list of scientific laws regarding atoms and their potential abilities. Roentagen, used Dalton’s findings and discovered x-rays which could pass through solid objects (Henderson 1). Although he did not discover radiation from the x-rays, he did help lay the foundations for electromagnetic waves. Shortly after Roentagen’s findings, J.J. Thompson discovered the electron which was responsible for defining the atom’s characteristics (Henderson 2). The electron helped scientists uncover why an atom responds to reactions the way it does and how it received its “personality”. Dalton’s, Roentagen’s and Thompson’s findings helped guide other scientists to discovering the uses of atomic energy and reactions. Such applications were discovered in the early 1900’s by using Einstein’s equation, which stated that if a chain reaction occurred, cheap, reliable energy could b...
...here the electrons move and go. The photons from the light transport energy and hit the electron, which transfers energy to the electron but slows down the photon. At last, in the 1920’s scientists came up with the wave-particle duality. The wave-particle duality stated that light had both properties of a wave and properties of a particle at the same time (Tavolacci).
The origin of the biological term cell came from Robert Hooke in 1662. He observed tiny compartments in the cork of a mature tree and gave them the Latin name “cellulae”, which translates into “small rooms”. In the late 1680s, Anton Van Leeuwenhoek was the first scientist to actually lay eyes on a cell. Before, there had been theories of “cells” but no one had the technology to see something so microscopic yet. Van Leeuwenhoek ran a draper 's shop and wanted to see the quality of the thread, better than the magnifying lenses available at that time. Therefore, he began to develop an interest in lens-making, with an interest already in microscopes and a familiarity with glass
One of the first robots was thought up by Leonardo Da Vinci. It was only a sketch of a mechanical knight, who was able to sit up, wave his arms, and move his head and jaws. It was unknown if he attempted to build it. Other automatons have also been created through history, but in 1926, Westinghouse Electric Corporation created the first robot to be used for work, Televox. The first autonomous robot was created in 1948 to 1949 by William Grey Walter, which could sense light and touch, and they moved around without human guidance. Finally, the first industrial robot was called Unimate, and it was used by General Motors to lift hot pieces of metal and stack them.
To conclude, robots could be the backbone of the society that will result in a technological revolution. Because of robots various characteristics that do not experience fear, nor exhaustion and they are precisely programmed, which make them able to help in case of need, housework, and factories production. Society needs to put the issue of robots into consideration to satisfy any shortage exists in the world.