Wave particle duality
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Wave-particle duality proposes that all particles exhibit both wave and particle properties. Light was originally thought to consist solely of waves or particles, but through the work of Planck, Einstein, Bohr and others, it is now understood that particles also have a wave nature, and vice versa. This phenomenon of wave-particle duality is a core principle of quantum physics where matter and light behave as both waves and particles depending on the experimental conditions.
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Hello everyone, I am Dr. Ujwalkumar Trivedi, Head of Biotechnology Department at Marwadi University Rajkot. I teach Molecular Biology to the students of M.Sc. Microbiology and Biotechnology.
The current presentation is like a history book of various discoveries that led to the development of quantum mechanics. The presentation also tries to address the debate between the radicals (supporters of quantum theory) and classical (supporters of Newtonian physics).02.Light-Lec2.pptx
Light can behave as both a wave and a particle. For centuries, scientists debated the nature of light, with some arguing it was a wave and others arguing it was a particle. Through experiments like the double slit experiment, it became clear that light exhibits properties of both waves and particles. The wave-particle duality of light is now described by quantum mechanics. Light acts as a wave when it travels and interferes, and as a particle, called a photon, when it is emitted, absorbed, or quantized. Both the wave and particle theories helped explain different observed phenomena but only the modern quantum mechanical theory of light fully describes its dual behavior.
Quantum theory
Quantum theory describes the behavior of small particles like electrons and photons. It seems counterintuitive because particles can act like waves and exist in multiple states at once until observed. The theory was developed between 1900-1930 and helped establish modern physics. It includes ideas like wave-particle duality, Heisenberg's uncertainty principle, and quantum fluctuations that allow particles to briefly exist from nothing. While still incomplete, quantum theory is well-supported by evidence and critical to technologies like computers.
THE UNIFICATION OF PHYSICS
The objective of this paper is to propose an approach to the unification of physics by attempting
to construct a physical worldview which can be used as the context for a unified physical theory.
The underlying principle is that we have to construct a clear description of the physical world
before we can build a unified physical theory.
The present state of physics is such that there are many theories which all differ in the descriptive
context in which they operate. The theories of general relativity, quantum theory, quantum
electrodynamics, string theory and the standard model of particle physics are based on differing
concepts of the nature of the physical world.
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Wave particle duality
- 1. Wave-particle duality Done by: Damien Poh(2a1)22
- 3. Light was thought either to consist of -waves (Huygens) or of -particles (Newton)
- 5. However, Democritus, who was the original atomist – argued that all things in the universe, are composed of indivisible sub-components (Particles)Democritus
- 8. Holds that matter and light exhibit the behaviors of both waves and particles, depending upon the circumstances of the experiment.
- 10. Under certain conditions, such as when we shine it through narrow slits and look at the result, it behaves as only a wave can. Under other conditions, such as when we shine it on a metal and examine the spray of electrons that comes off, light behaves as only particles can.
- 12. Massive objects exhibit very small wavelengths, so small in fact that it's rather pointless to think of them in a wave form.
- 15. THE END