His thinking was guided by the notion that light has both wave and particle characteristics, so he postulated that particles such as electrons and protons. Matter, though it can behave like particles, also behaves like a wave. The wave nature of matter is evidently a memory of its origin in light, much as the particle. Rohilkhand university pdf book manual free download.
The lambda here represents the wavelength of the particle and p represents the momentum of the particle. Pdf the quantum and relativity theories of physics are considered to underpin all of. Quantum properties were first observed in electromagnetic fields. As albert einstein wrote it seems as though we must use sometimes the one theory and sometimes the other, while at. Neet physics notes optics matter waves debroglie waves debroglie waves the concept of debroglie waves reflects the waveparticle duality of matter.
It expresses the inability of the classical concepts particle or wave to fully describe the behaviour of quantumscale objects. In his 1924 phd thesis, he postulated the wave nature of electrons and suggested that all matter has wave properties. Einstein had shown that a complete description of cavity radiation requires both the particle and wave aspects of cavity radiation. For photons, this relation is a straightforward consequence of e hf since a light wave has p ecand f c, where cis the speed of light. It means when the matter is moving it shows the wave properties like interference, diffraction etc. Comptons formula established that an electromagnetic wave.
The debroglie relations shows that the wavelength is inversely proportional to the momentum of a particle and is also called debroglie. In our discussion of compton scattering, we derived the relationship ph. Davisson and germer measured the wavelength of electrons by firing a beam of electrons at a nickel crystal, which acts like a. It was einstein who proposed that waves light could behave like particles photons. Interpretation of quantum mechanics by the double solution. A causal interpretation, elsevier publishing company, 1960. Raised microwave electrodes can provide an electron guide with radial. In quantum theory it leads to an incomprehensible interpretation of the wave nature of matter in terms of a. Quantum physics i, lecture note 4 mit opencourseware. The two principles of least action for electron dynamics 18 2. This result, recognised by the nobel prize in 1929, gave rise to a major direction of new physics known today as. What does it mean to have 1 meter wavelength for that object.
Waveparticle duality is the concept in quantum mechanics that every particle or quantum entity may be described as either a particle or a wave. Plancks research on the laws of the thermal radiation of bodies 1900, the concept of light portionsquanta of an electromagnetic field. This page contains materials for the session on particlewave duality. Neet physics notes optics matter waves debroglie waves. The american physicists clinton davisson and lester germer proved that electrons have wavelike properties in 1927.
Two principles of least action in classical dynamics 16 2. But then, the wave nature of electromagnetic radiation is called into question when it is involved in blackbody radiation, photoelectric e. Holland 2000 separates the guide wave from the postulated. The theory of matter waves was used to justify quantization of. It also explores how the alternative the ring current model of an electron or of matter particles in general. Focus on modern frontiers of matter wave optics and. Comptons formula established that an electromagnetic wave can behave like a particle of light when interacting with matter. Pdf practical matterwave antiballistic defense shield. It features a 1hour lecture video, and also presents the prerequisites, learning objectives, reading assignment, lecture slides, homework with solutions, and resources for further study.
1202 842 1397 58 1417 1624 289 1055 446 471 219 803 1411 26 1461 807 641 1172 747 958 638 1156 441 1319 126 1269 999 116 449 529 761 390 848 647 1178 1165 1368 260 1124