what are quantum mechanics?❤
Answers
★ Quantum Mechanics
- A physics theory, is a branch of physics that studies the laws of the movement of microscopic particles in the physical world . It mainly studies the basic theory of the structure and properties of atoms , molecules , condensed matter, and atomic nuclei and elementary particles . Together with the theory of relativity , it forms the theoretical basis of modern physics. Quantum mechanics is not only one of the basic theories of modern physics, but also widely used in chemistry and other disciplines and many modern technologies.
At the end of the 19th century, it was discovered that the old classic theory could not explain the microscopic system, so through the efforts of physicists, quantum mechanics was created in the early 20th century to explain these phenomena. Quantum mechanics fundamentally changes human understanding of the structure and interaction of matter. In addition to the gravity described by general relativity, all basic interactions so far can be described within the framework of quantum mechanics (quantum field theory).
★ Quantum mechanics is a theory that describes microscopic matter. Together with the theory of relativity , it is considered to be the two basic pillars of modern physics. Many physical theories and sciences such as atomic physics , solid physics , nuclear physics and particle physics and other related Disciplines are all based on quantum mechanics.
Quantum mechanics is a physical theory describing atomic and subatomic scales . This theory was formed in the early 20th century and completely changed people's understanding of material composition. In the microcosm, particles are not billiard balls, but buzzing probabilistic clouds . They not only exist in one position, but also do not reach point B from point A through a single path. According to quantum theory, particles often behave like waves , and the "wave function" used to describe the behavior of particles predicts a particle's possible characteristics, such as its position and velocity, rather than certain characteristics. Some weird concepts in physics, such as the principles of entanglement and uncertainty , are derived from quantum mechanics.
At the end of the 19th century, the deficiencies of classical mechanics and classical electrodynamics in describing microscopic systems became more and more obvious. Quantum mechanics was founded in the early 20th century by Max Planck , Niels Bohr , Werner Heisenberg , Erwin Schrodinger , Wolfgang Pauli , Louis De Broglie , Max · Born , Enrico Fermi , Paul Dirac , Albert Einstein , Compton and a large number of physicists co-founded.
Quantum mechanics was developed on the basis of old quantum theory . Old quantum theory includes Planck 's quantum hypothesis, Einstein 's light quantum theory and Bohr 's atom theory.
- In 1900, Planck proposed the radiation quantum hypothesis, assuming that the exchange of energy between electromagnetic fields and matter is realized in the form of discontinuous (energy), the size of the energy is proportional to the radiation frequency, and the proportionality constant is called the Planck constant . The Planck formula is given, and the blackbody radiation energy distribution is correctly given .
- In 1905, Einstein introduced light quanta ( photons ) concept, and gives the energy of the photon, the momentum of the relationship between frequency and wavelength of radiation, successfully explained the photoelectric effect . Later, he proposed that the vibrational energy of solids is also quantized , which explains the specific heat of solids at low temperatures .
- In 1913, Bohr established the quantum theory of atoms based on Rutherford ’s original nuclear atom model. According to this theory, electrons in atoms can only move on separate orbits. When moving on orbits, electrons neither absorb energy nor emit energy. Atoms have definite energy, and the state they are in is called " steady state ", and atoms can only absorb or radiate energy from one stationary state to another stationary state. Although this theory has many successes, it has many difficulties for further explaining the experimental phenomenon.
After people realized that light has the duality of waves and particles, in order to explain some phenomena that classic theory cannot explain, French physicist De Broglie proposed the concept of matter waves in 1923 . It is believed that all microscopic particles are accompanied by a wave, which is called De Broglie's wave.
and so on in this field....
Good morning Kavya, what happened r u sad, can I know the reason,
plsss tell me is it my fault if it is then I am sorry.
The words above r because of ur unusual bio, plss tell me that they r not true, cause I don't want you to be sad!!!!❤❤❤❤please be happy!!!❤❤❤