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Jonathan Kelly
Приєднався 3 лис 2013
Quantum Physics 1 - excitation of atoms
Looking at the Bohr atom and how atoms can be excited and subsequently emit photons when they de-excite
a correction: around 19:00 when discussing the different ways that the atom can de-excite, I overlooked one of the possible routes (4 to 3 to 2 to 1 in 3 steps). this would add a 6th distinct photon energy.
Also just wanted to point out that the spectrum of light you would see from a star is more complicated than I suggest in the video. This doesn't affect the key point, but I should have chosen an electrically excited gas (e.g a neon tube) as an example of something that gives a simple spectrum of bright emission lines.
a correction: around 19:00 when discussing the different ways that the atom can de-excite, I overlooked one of the possible routes (4 to 3 to 2 to 1 in 3 steps). this would add a 6th distinct photon energy.
Also just wanted to point out that the spectrum of light you would see from a star is more complicated than I suggest in the video. This doesn't affect the key point, but I should have chosen an electrically excited gas (e.g a neon tube) as an example of something that gives a simple spectrum of bright emission lines.
Переглядів: 149
Відео
Quantum Physics 3 - wave particle duality
Переглядів 534 роки тому
Looking at how both light and massive particles can behave as waves or particles, and the idea of the de Broglie wavelength
Quantum Physics 2 - mercury lamp
Переглядів 344 роки тому
Looking at a fluorescent light bulb as an example of atoms being excited and ionized by different processes
The Photoelectric Effect 4
Переглядів 404 роки тому
How observations of the photoelectric effect can be explained using the particle model of light, and not by the wave model
The Photoelectric Effect 1
Переглядів 304 роки тому
Introducing what the photoelectric effect is and considering some differences between the wave and photon models of light
The Photoelectric Effect 3
Переглядів 234 роки тому
Looking at the apparatus used to make measurements of the photoelectric effect and the results of the measurements
Feynman diagrams 5 - strong nuclear interactions
Переглядів 1,1 тис.4 роки тому
Looking at the strong nuclear force and its mediation by virtual pions
Feynman diagrams 4 - more weak interactions
Переглядів 2,7 тис.4 роки тому
Looking at electron capture, electron-proton collision, and kaon decay.
Feynman diagrams 3 - some weak interactions
Переглядів 1,8 тис.4 роки тому
Looking at neutrons, protons and muons decaying via the weak force
Feynman diagrams 2 - annihilation and pair production
Переглядів 4,2 тис.4 роки тому
Looking at the processes of electromagnetic annihilation and pair production and how to draw Feynman diagrams for these processes
Feynman diagrams 1
Переглядів 1,4 тис.4 роки тому
Looking at electron scattering as a first example of Feynman diagrams