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In the world of subatomic particles, the rules that normally apply to objects that are visible by the human eye are totally disregarded. Subatomic particles behavior can be attempted to be explained by a term called quantum mechanics. Quantum mechanics gives the probability of where a particle will be located at, such as point A or point B. It describes atoms or particles, really anything at that level or smaller in a similar way in which relativity describes the laws of how much larger objects behave. But quantum mechanics itself goes so much deeper than just simply saying it is used to predict where a particle will be located, it is also known as quantum physics.
Quantum physics is based off of Quantum Theory which comes from a series of three different experiments performed in the 20th and 19th century. The double slit experiment was the first to give an insight of quantum mechanics, and actually happened before quantum mechanics was even discovered. Thomas young came up with a version as far back as 1801, from which has been repeated thousands of times since by scientists. The double slit experiment is set up with two slits, and a light source behind the slits and then once the light passes through the slits it forms an interference pattern. Prior to the double slit experiment light was known to behave as waves. When scientists shoot the light through the slits, they found that it radiated out at each source, as if it was a whole new source, causing all new ripples. Then scientists shot just one light beam through, and which it formed an interference pattern of lines. Baffling the scientists, they then shot one atom at a time through the slits, and in return the same results were observed. Giving the idea that light acts as w...
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... frequency with it that is used as a basis of time. Once the oscillations per second are figure out, you have time figured out for the clock.6.
With all of the new innovations of today and tomorrow, many of the innovations would not be achievable without the discovery of quantum mechanics. It has gave a whole new in-depth look at the world of subatomic particles like never seen before. It is mind blowing to the world of science and that itself is what intrigues scientists, there is so many questions yet to be answered. It defies modern science as we know at times. The theory of relativity goes against what it says, but yet quantum theory is still proven to be true time and time again with mathematical formulas and experiments. In conclusion, quantum mechanics helps us to get a slight grasp of how subatomic particles behave and where they can be positioned at.
In 1906, a scientist by the name of Richard Dixon Oldham had suggested a theory structured another scientists findings by the name of Emil Wiechert. Oldham had identified that S waves and P waves behaved differently and
A famous thought experiment in quantum physics is that of Schrödinger’s cat. In this experiment, a cat is placed in a box with poison that has a chance to either explode, killing the cat, or not explode, allowing the kitty to live. Although some would object, we ought to open the box to see if the cat is alive or not. Similarly, we should attempt to uncover reality instead of accepting the current dogma. In his article, “Can the Sciences Help Us to Make Wise Ethical Judgements?” Paul Kurtz argues that not only can science help through inquiry but it already plays an active role in shaping our moral conduct. According to him, ethical judgement and science meet somewhat halfway and although we cannot come up with a specific set of instructions
J.J. Thompson didn’t really believe that the atom was the smallest piece to matter. So he did some experiments with running current through a glass tube with the air sucked out of it. That’s what a cathode ray tube is. It has a negative charge attached to the cathode (the metal piece farthest to the side of the tube) and the positive charge attached to the anode (the metal piece closer to the center of the tube). After running current through the cathode he realized that a stream of light was projected from the end that was being charged to the opposite and showing at the inside of the tube. He wasn’t very sure what it meant at first but then he figured it out.
The novel, Alice and Quantum Land, by Robert Gilmore is an adventure in the Quantum universe. Alice, a normal teenage girl, goes through quantum land and understands what quantum is and how it works. The quantum world is a difficult one to understand, as its nature is one of complex states of being, natures, principles, notions, and the like. When these principles or concepts are compared with the macro world, one can find great similarities and even greater dissimilarities between the world wherein electrons rule, and the world wherein human beings live. In Alice in Quantumland, author Robert Gilmore converts the original tale of Alice in Wonderland from a world of anthropomorphic creatures into the minute world of quantum mechanics, and attempts to ease the reader into this confusing world through a series of analogies (which comprise an allegory) about the principles of quantum mechanics. Through Alice’s adventure she comes across some ideas or features that contradict real world ideas. These ideas are the following: Electrons have no distinguishing spin, the Pauli Exclusion Principle, Superposition, Heisenberg Uncertainty Principle, and Interference and Wave Particle Duality.
In 1864, James Clerk Maxwell revolutionized physics by publishing A Treatise On Electricity And Magnetism (James C. Maxwell, Bio.com), in which his equations described, for the first time, the unified force of electromagnetism (Stewart, Maxwell’s Equations), and how the force would influence objects in the area around it (Dine, Quantum Field Theory). Along with other laws such as Newton’s Law Of Gravitation, it formed the area of physics called classical field theory (Classical Field Theory, Wikipedia). However, over the next century, quantum mechanics were developed, leading to the realization that classical field theory, though thoroughly accurate on a macroscopic scale, simply would not work at a quantum, or subatomic scale, due to the extremely different behaviour of elementary particles. Scientists began developing a new ideas that would describe the behaviour of subatomic particles when subjected to the fundamental forces (QFT, Columbia Electronic Dictionary)(QFT, Britannica School). Einstein’s theory of special relativity, which states that the speed of light is always constant and as a result, both space and time are, in contrary, relative, was combined into this new theory, allowing for accurate descriptions of elementary
The author tells of how waves are effected by quantum mechanic. He also discusses the fact that electromagnetic radiation, or photons, are actually particles and waves. He continues to discuss how matter particles are also matter, but because of their h bar, is so small, the effects are not seen. Green concludes the quantum mechanics discussion by talking about the uncertainty principle.Chapter 5: The need for a New Theory: General Relativity vs.
This Essay is meant to shed light on a complex subject, quantum entanglement. Now, quantum entanglement is a part of much more complex subjects, such as classical mechanics, quantum theory, and quantum mechanics; these subjects will not be covered. The idea of quantum entanglement will be explained: What it is and when does it happen. After a little understanding of Entanglement, a discussion will follow on what it means for us from a technological standpoint and what can we accomplish in the near future. Pushing that idea further into the future looking at bigger possibilities in transportation, and what potential liabilities and moral dilemmas could ensue. It is my belief that quantum entanglement could accomplish many great things, but could
In 1905 Einstein published the Annus Mirabilis papers. These papers explained each of his four main theories; the photoelectric effect, Brownian motion, Special Relativity and Matter energy-equivalence. These four works created the foundation for modern day physics and brought a new view to space, time and matter. Brownian motion is the random movement of small particles in either a gas or a liquid caused by collisions with the particles around them. Albert Einstein came up with mathematical equations that allowed him to determine the exact size of atoms. With these equations Einstein essentially provided the first substantial evidence that atoms actually do exist. Einstein’s second paper was on the photoelectric effect. Until Einstein, the photoelectric effect went unsolved. Einstein concluded that when a photon hits a metal surface, the photoelectrons on the metals surface are emitted as certain light frequencies. Thus proving that light has quanta meaning it has packets of energy. This has brought huge technological advancements and has a lot to do with many things that surround us today. Old television used video camera tubes that required the photoelectric effect to charge the screen and transform the image...
Physics can be found in all aspects of our lives and the world around us including the activities in which we find the most enjoyment. They may not be noticeable to the naked eye or even to our senses but they are there and when we become familiar with the concepts of physics then we began to ‘see’ physics everywhere.
The Ultimate Nature of Matter. 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.
In 1801 Thomas Young provided some very strong evidence to support the wave nature of light, he placed a monochromatic light in front of a screen with two slits cut into it, and observed an interference pattern, only possible if light was a wave. In 1965 Richard Feynman came up with a thought-experiment that was similar to Young’s experiment. In Feynman’s double-slit experiment, a chosen material is fired at a wall which has two small slits that can be opened and closed at will – some of the material gets blocked and some passes through the slits, depending on which ones are open.
The book is not providing explanation on what scientists did or how they did it. However, it offer explanations on how scientists think and how they make conclusions. In addition to the many topics explored, it is worth noting that there are also interesting tales behind some big discoveries in science which are an added attraction to this book. The Author, Dr Samir Okasha, a professor of philosophy of science at the Bristol University states that his aim of writing this book was to pass the philosophy of science in a way that can be understood by everyone. He also sought to pass his ideals in a manner that is free from complicated Jargon, with real world examples to enable all readers understand and
Some physical entities such as light can display some characteristics of both particles and waves. Before the early 20th century, scientists believed that light was in the form of an electromagnetic wave. It wasn’t until the 20th century onwards that scientists found that light has properties of waves and particles. Scientists discovered different properties of light through experimentation and allowed them to determine that light actually has a wave-particle duality.
There are still limitations in classical cryptography, it is purely mathematical and information cannot be separated from its physical representation. In Classical physics, we use binary form to store and process the data. In the 1980s, C.Bennet, P.Benioff, R.Feynman and others observed that new and very powerful ways of information processing are possible with quantum mechanical systems. This gave birth to the concept of quantum computing.
Figure 1: Image of the nanoscale, this illustration shows how small things at the nanoscale really are (nano.gov, 2013).