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Wave Particle Duality
Fichas del conjunto (6)
- 1Compton scatteringThe scattering of a photon by a charged particle, usually an electron
- Sometimes, the energy and momentum of the photon is transferred to the electron (elastic, λ of photon changes)
- In other collisions, no energy is transferred - 2De Broglie's hypothesisStates that matter behaves like a wave
- Anything that has momentum also has a wavelength
- If a moving particle has a high momentum, it exhibits wave properties and has a small though measurable wavelength - 3Davission and Germer experimentThey fired electrons into a crystal structure, which produced a diffraction pattern of areas of electrons and no electrons on the screen behind it
- 4Young’s double slit experiment with electrons- Incident light is replaced with a stream of electrons
- Constructive interference => high electron intensity detected
- Destructive interference => no electrons detected
- When one slit is blocked, the electrons diffract but there is no interference pattern
- When both slits are open, the interference pattern forms even when only one electron passes through at a time - 5Quantum physics and Young's double slit experimentWhen an electron is observed, it behaves like a particle, and when not observed, it behaves like a wave
- A single electron passes through both slits at once and interferes with itself
- However, when a detector is placed at each slit, it only detects one electron passing through one slit and no pattern forms - 6Matter waves and the Bohr model- Bohr could not explain the quantised energy levels in an atom
- De Broglie suggested that an electron must form a standing wave, where its wavelength fits an integer number of times around the circumference of the orbit
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- (Wave Particle Duality and Quantum Theory) Physics Y12 Fichas sobre Wave Particle Duality, creado por Mel M el 06/08/2017.
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- Mel M
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