When you press the key on your laptop, lots of thing are happening that could not happen but for quantum physics.
The key sensor requires it. Every electronic gate from the internal clocks to the keyboard scanner to the CPU to the display screen would not work without it.
Even the very fact that your chair supports you, and your fingers push the keys down instead of just passing through them is due to quantum physics. Oh, by the way, your self wouldn't even exist without QM, never mind your eyes not being able to receive quantum photons as you read this. The ubiquitous electronics only exist because someone took the trouble to learn quantum physics and apply it. But to just use the toys, you don't need to know.
The laws of quantum mechanics are always valid, but in everyday circumstances those laws can be well-approximated by those of classical mechanics. Your question seems to be, "why should I care about quantum mechanics if its irrelevant to my everyday experiences? I should add that quantum mechanics is necessary to account for the observation of such phenomena. There are an increasing number of technological devices the development of which depended upon quantum mechanics.
If you use any of these devices, then the underlying quantum physics theory affects you. Please see this previous question: Are there any practical applications of the uncertainty principle. Also here is list from a popular science site that may help you: 10 Real-World Applications of Quantum Mechanics. Sign up to join this community. The best answers are voted up and rise to the top.
In most physical phenomena we encounter in our everyday lives, we do not see these discrete amounts of energy; the quantum properties of particles are hidden from our eyes. Nevertheless, quantum theory is essential for the way we understand the world.
Without it we could not properly explain the colors of the sun and the sky, basic properties of materials, nor the periodic table of elements. On the more practical side, basic technologies that we use every day are based upon quantum theory: for instance transistors the basic components of computers, calculators and cellphones of all kinds , lasers, LED and fluorescent lamps, solar cells, MRI machines in hospitals, magnets etc. Boomerang — Question Back at You What cat is famous in the context of quantum theory and what basic principle in the theory does it demonstrate?
Fluorescent Lights : Old-school incandescent light bulbs make light by getting a piece of wire hot enough to emit a bright white glow, which makes them quantum in the same way that a toaster is. If you have fluorescent bulbs around-- either the long tubes or the newer twisty CFL bulbs, you're getting light from another revolutionary quantum process.
Way back in the early 's, physicists noticed that every element in the periodic table has a unique spectrum: if you get a vapor of atoms hot, they emit light at a smallish number of discrete frequencies, with a different pattern for every element. These "spectral lines" were quickly used to identify the composition of unknown materials, and even to discover the presence of previously unknown elements-- helium, for example, was first detected as a previously unknown spectral line in light from the Sun.
While this was undeniably effective, nobody could explain it until when Niels Bohr picked up on Planck's quantum idea which Einstein extended in and introduced the first quantum model of an atom. Bohr suggested that there are certain special states in which an electron can happily orbit the nucleus of an atom, and that atoms absorb and emit light only as they move between those states.
The frequency of the light absorbed or emitted depends on the energy difference between states in the way introduced by Planck, thus giving a set of discrete frequencies for any particular atom. This was a radical idea, but it worked brilliantly to explain the spectrum of light emitted by hydrogen, and also the x-rays emitted by a wide range of elements, and quantum physics was off to the races.
While the modern picture of what's going on inside an atom is very different than Bohr's initial model, the core idea is the same: electrons move between the special states inside atoms by absorbing and emitting light of particular frequencies.
This is the core idea behind fluorescent lighting: Inside a fluorescent bulb either long tube or CFL there's a little bit of mercury vapor that's excited into a plasma. Mercury happens to emit light at frequencies that mostly fall in the visible spectrum in a way that can fool our eyes into thinking the light looks white. If you look at a fluorescent bulb through a cheap diffraction grating like you'll find in novelty glasses, you'll see a few distinct colored images of the bulb, where an incandescent bulb gives a continuous rainbow smear.
So, any time you use fluorescent lights to light your home or office, you have quantum physics to thank for it. High angle shot of an unrecognizable young businesswoman working on her laptop in her home office.
Computers : While Bohr's quantum model was undeniably useful, it didn't initially come with a physical reason as to why there should be special states for electrons within atoms. Well, this is not the only implication there is. Through this feature of superposition, scientists are finding results that suggest the existence of parallel dimensions, and even more than one Universe, the Multiverse.
When an object is in superposition, it behaves like a cloud of possibilities, with every outcome branching off and playing itself out. This suggests that there is indeed parallel worlds very similar to our own, but with slight differences. In one of these branching realities, you may have never met your girlfriend or boyfriend, husband or wife. In another, you may have enrolled for summer classes, or decided to take a semester off.
I know this sounds like something straight out of a science-fiction novel, but there is very strong, and even compelling evidence to support this theory. The quantum world, even partially understood, is like a gateway into uncharted realms of possibilities. The world of quantum mechanics is truly a mysterious one. With amazing discoveries and life-altering implications around every turn, the quantum realm continues to amaze and baffle scientists and the everyday person alike.
But with the passing of each day, we come closer to unlocking these deep secrets of the cosmos. So we have come to the number one implication of the quantum mechanics, and in my opinion, the most profound: Consciousness creates reality. It may take some time for anyone to truly grasp this concept, so allow me to help speed up that understanding. First of all, we must understand the question: What is consciousness?
Consciousness is the state of being aware, the sense of being an individual, to know your surroundings, and act accordingly to preserve and maintain your continued existence. For years upon years, we have learned in schools and higher education alike, that matter creates consciousness. Scientists believed that anything could become conscious if put together correctly. Quantum mechanics smashes that idea completely. Looking for consciousness in the brain is like taking apart your PlayStation 4 and expecting to find characters from your favorite games.
There is only consciousness, and everything we see is created only because we are conscious. This implication is staggering in its beauty and simplicity, because it implies that the internal world of thoughts, dreams, and emotions, is just as real as the external world of cars, buildings, and planets. This implies that we all share the same consciousness, and we are just merely individual pieces to a much larger puzzle.
Think of it this way: we are like islands on the ocean, separated on the surface, but connected in the deep.
This amazing concept has led my consciousness to the most awe-inspiring and unexpected of places. It may sound rather peculiar to find God through science, but I am not alone in this endeavor. Science has always had the reputation of being faithless and non-spiritual, full of atheists who would scoff at the word God, and to a certain extent this could be viewed as true.
However, since the advent of quantum mechanics, when the implications were better understood, we are beginning to see a paradigm shift, a changing in the way we view the cosmos on a fundamental level.
Many scientists today have a belief in God, and use science as a tool to prove the existence of the divine. Religion, on the other hand, has seen as transformation over the years. This is a far cry from the days of the Inquisition, where free thinkers were killed or locked up for suggesting such a thing.
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