Quantum: What does it mean and how it adds meaning to our life?
In physics, a quantum (plural quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
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In this Universe everything is made up of atoms. All Matter is made up of atoms. Atoms were considered indivisible earlier. Now , we know that atoms can be divided further into tiny subatomic particles. In a simple way we can say that the main subatomic particles are protons, electrons and neutrons. The protons and neutrons are present inside the nucleus of an atom and contribute towards the mass of an atom while the electrons are orbiting around the nucleus in a definite path. The energy of each electron is quantised.
Niel Bohr's model of an atom helps us to understand how the energies are distributed in an atom.For that work he received the Nobel Prize for Physics in 1922.
Bohr model of the atom
In the Bohr model of the atom, electrons travel in defined circular orbits around the nucleus. The orbits are labeled by an integer, the quantum number n. Electrons can jump from one orbit to another by emitting or absorbing energy. The inset shows an electron jumping from orbit n=3 to orbit n=2, emitting a photon of red light with an energy of 1.89 eV.
Encyclopædia Britannica, Inc.
Later, came the Quantum Mechanical Model of an atom where it describes the wave particle duality of an electron.This quantised energy is the energy of an atom that helps us to understand the mysteries of this universe.Quantum theory is all about this matter and energy. It has bewildered everyone with the endless possibilities of the relation between matter and energy.
The famous Einstein equation- “Theory of Relativity”
E=MC2
This marked the turning point in the study of matter and states that energy and mass are interconvertible.
The credit of quantum theory goes not to only one scientist but to multiple scientists who have put their efforts to make things happening in our surroundings easy to understand.
Max Planck, in full Max Karl Ernst Ludwig Planck, (born April 23, 1858, Kiel, Schleswig [Germany]—died October 4, 1947, Göttingen, Germany), German theoretical physicist who originated quantum theory, which won him the Nobel Prize for Physics in 1918
Planck made many contributions to theoretical physics, but his fame rests primarily on his role as originator of the quantum theory. This theory revolutionized our understanding of atomic and subatomic processes, just as Albert Einstein’s theory of relativity revolutionized our understanding of space and time. Together they constitute the fundamental theories of 20th-century physics. Both have forced humankind to revise some of the most-cherished philosophical beliefs, and both have led to industrial and military applications that affect every aspect of modern life.( Encyclopedia Britannica)
Quantum mechanics is based on the foundation principle where matter can behave as a particle( electrons) and as a wave.The duality of matter as a particle and wave, quantization principles and the Heisenberg uncertainty principle started a new era of Quantum mechanics.
Have a look on these scientists and their thoughts:
So, to conclude today’s blog I would leave you all with a question:
Are we matter or energy?
In my next blog I will continue with quantum theory and I will also talk about “ AUM” , which is a sacred sound and a spiritual symbol in Indian religions. It signifies the essence of the ultimate reality, consciousness or Atman.