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Quantum Mechanics
Quantum Mechanics is the branch of physics that deals with the study of the structure and behavior of atoms and molecules. It is primarily based on Max Planck's Quantum theory, which incorporates Heisenberg's uncertainly principle and the de Broglie wavelength to establish the wave-particle duality on which Schrodinger's equation is based.
916 Questions
Advantages of vector quantization over scalar uantization?
Vector quantization can achieve higher compression ratios compared to scalar quantization by capturing correlations between adjacent data points. It can also offer improved reconstruction quality since it retains more information about the original signal. Additionally, vector quantization is better suited for encoding high-dimensional data or signals with high complexity.
What is the nature of light particle?
Light is said to exhibit wave-particle duality because it is observed to behave as both a wave and a particle.
When we shine light into narrow slits, the phenomenon of interference occurs and leads us to believe that light behaves as a wave. On the other hand, if light is shone on a metal, the spray of electrons indicates light behaves as a particle. This is the dual nature (wave and particle) behaviour being referred to.
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What states that no two electrons can have the same energy level?
The Pauli exclusion principle states no two electrons can have the same energy level. More exactly it states that no two electrons can have the same set of quantum numbers.
What are the principles of quantum cryptography?
Cryptography using quantum systems, which enable two parties to produce a shared random bit string known only to them, which can be used as a key to encrypt and decrypt messages, but not as a form of encryption itself. The nature of quantum cryptography is such that any attempt by eavesdroppers to ascertain the key will alert the authenticated participants of the Quantum Key Distribution scheme.
Acting normally and learning by trial and errors
What can one do with a Quantum pad?
The LeapFrog Quantum Pad Learning System is used to to help kids learn a variety of skills suited to developing children. It mostly just plays a variety of educational games.
Is it possible to make an Infinite Improbability drive?
As of now, creating an actual "Infinite Improbability Drive" as seen in Douglas Adams' "The Hitchhiker's Guide to the Galaxy" is purely fictional and not feasible in reality. It exists as a humorous and nonsensical concept in the realm of science fiction.
Why is Heisenberg's uncertainty principle not more apparent in our daily life?
Heisenberg's uncertainty principle relates the fundamental uncertainty in the values of certain pairs of properties of a particle (e.g. momentum and position, energy and time) to a fundamental constant of nature known as Planck's Constant. Since Planck's constant is extremely small (~6.62
What is mean by normalising a wave function?
When a mathematician "normalizes" any function involving probability, it means she multiplies the function by the number necessary for the grand total probability of SOMETHING happening to be 1. If y is a function of x, such that y is the probability of something happening if x is equal to a value, and x can range from any value from -∞ to ∞; then we know that
ʃ f(x)dx,
where x ranges from -∞ to ∞
MUST be equal to 1.
That's because SOMETHING has to happen over all the values of x.
For example, if
f(x) = e^(-x^2/2)
then
ʃ f(x)dx over that range would √2ᴨ
To "normalize" that probability function would require that she multiply the original function by 1/√2ᴨ, so that the probability of the integral of y over all ranges of x -- the probability of SOMETHING happening -- would be 1.
If ɸ(x) is the quantum wave function of a particle at position x, then we know that, over the entire range of x from -∞ to ∞,
ʃ ɸ(x)*ɸ(x)dx MUST be equal to 1.
That's because the particle must be SOMEWHERE.
Depending on what ɸ(x) is, the mathematician would have to multiply the integral by some value in order for the integral over all possible values of x to be equal to one.
How did quantum mechanics change out understanding of atoms?
Not just of atoms - but of everything. Some things we learned is that:* There are truly random processes in nature.
* We can't measure certain things with arbitrary precision (certain magnitudes, or combinations of magnitudes, in nature, aren't even DEFINED).
* Particles that are quite distant from one another can be somehow connected, in a weird way.
Why is Hesin's Berg uncertainty principle not more apparent in our daily life?
This is the mathematical form of Heisenberg's Uncertainty Principle:
deltaX * deltaV >= h/m
Where X is position and V is velocity. This reads: "The Uncertainty of Position multiplied by The Uncertainty of Velocity is always greater than or equal to Plank's constant over mass". IE - the more you know position, the less you know velocity.
However, in macroscopic systems like 'daily life', "mass" tends to be very big indeed. And so the right hand side of the equation becoms tiny. Therefore the left hand side must become tiny too. So the uncertainty becomes miniscule for objects with big mass, and so we don't notice it.
What are the two parts of the Heisenberg uncertainty principle?
Heisenberg uncertainty principle states that , the momentum and the position of a particle cannot be measured accurately and simultaneously. If you get the position absolutely correct then the momentum can not be exact and vice versa.
The energy leaves as either a photon or phonon.
What do the variables in Boltzmann's constant mean?
- The Boltzmann constant (kB or k), named after Ludwig Boltzmann, is a physical constant relating energy at the individual particle level with temperature.
- It is the gas constant R divided by the Avogadro constant
- It has the same dimension (energy divided by temperature) as entropy. The accepted value in SI units is 1.3806488(13)×10−23 Joule/degree K
- For more information refer to link below.
Who had two theories of relativity and was big in quantum mechanics?
Albert Einstein developed the theories of general relativity and special relativity. He also did work in quantum theory. (He won a Nobel prize for his work with light.)
Classical physics refers to the branch of Physics whereby energy and matter are two very different concepts. It is usually based on the theory of electromagnetic radiation and the laws of motion.
What will be the theory after the quantum theory of light?
There is unlikely to be a successor to a quantum theory of light, by the definition that the quantum theory of light is that "Light is made up of discernible particles", has very strong evidence to support it, and no alternative explanation has yet been found to explain such effects as the photoelectric effect.
If you mean quantum electrodynamics, the section of the standard model of particle physics that explains light, electricity and magnetism, and therefore the standard model of particle interaction, then the only answer is that absolutely nobody knows. In fact, finding a successor to the standard model, which despite being one of the best theories ever developed is full of more holes than the titanic if taken as a theory of everything, is one of the biggest deals in all of science.
One possible successor to the theory of quantum electrodynamics is the section of superstring theory that explains electromagnetism, but there are many who don't think string theory will be the answer to physics' problems, and certainly string theorists have yet to find any strong evidence supporting their theories.
How much does one gram of antiproton cost?
This will be a expensive bill to pay. It will set you back 62.5 trillion dollar. But there is problem, to make a gram of anti-protons will take a few million years whit current technology. But in the near future we can do it a lot quicker.
When dealing with an air track why is it smart to avoid measuring right at the collision site?
Tracks in cloud chambers are the "contrails" left by ionizing particles. The magnetic field that set up across the observational space will act on charged particles and deflect them. The curves these particles carve out are better measured a bit away from the site of the origin because greater accuracy can be obtained out there.
If we look at the arc a charged particle takes when acted on by the magnetic field, it is easier to take measurements along the curve farther out because there will be "more track" to work with, and greater accuracy will result. This might not be true with particles that lose energy quickly and "spiral in" to disappear, but it is a good general idea to make measurements out away from a scattering event because better accuracy can usually be had there.
All matter is made up of tiny particles called atoms, which consist of protons, neutrons, and electrons. These atoms combine and form different elements, which can then bond together to create compounds and complex structures.
