The Quantum Atom
Weirder and Weirder
Wave-Particle Duality
Louis de Broglie (1892-1987)
Wave-Particle Duality
Louis de Broglie (1892-1987) De Broglie Hypothesis: Any moving particle
has an associated wave nature (1924). E
k=hf true for electrons and all matter
Wave-Particle Duality
De Broglie Hypothesis: Any moving particle has an associated wave nature (1924).
Ek=hf true for electrons and all matter
This means that light is not the only weird thing, all matter is weird
De Broglie's Hypothesis tested in 1927 by Cliffton Davisson and Lester Germer of Bell Laboratories. They document electron diffraction
Nobel Prize
De Broglie won in 1929 for his work
Davisson and Germer won in 1937 for their work
The Impact
De Broglie's hypothesis meant it was possible to predict the behavior of matter (including subatomic particles) using wave equations
The Impact
De Broglie's hypothesis meant it was possible to predict the behavior of matter (including subatomic particles) using wave equations
This idea was crucial for the development of quantum mechanics
Werner Heisenberg
Electrons interact with photons because they have similar wavelengths.
Werner Heisenberg
Electrons interact with photons because they have similar wavelengths.
Photons are used to detect electrons
Werner Heisenberg
Electrons interact with photons because they have similar wavelengths.
Photons are used to detect electrons Because of the relationship, any attempt to find
the velocity and position of an electron causes those quantities to change (the Heisenberg uncertainty principle)
Werner Heisenberg
Electrons interact with photons because they have similar wavelengths.
Photons are used to detect electrons Because of the relationship, any attempt to find
the velocity and position of an electron causes those quantities to change (the Heisenberg uncertainty principle)
Nobel prize in Physics 1932
Erwin Schrödinger
1926 used the dual particle-wave nature to develop wave equations that predicted where electrons were
Erwin Schrödinger
1926 used the dual particle-wave nature to develop wave equations that predicted where electrons were
Only waves of specific energies (particular frequencies) fit the equation—this corresponds to the energy levels that Bohr proposed
Erwin Schrödinger
1926 used the dual particle-wave nature to develop wave equations that predicted where electrons were
Only waves of specific energies (particular frequencies) fit the equation—this corresponds to the energy levels that Bohr proposed
Nobel prize in Physics 1933
Quantum Mechanics
Based on the work of de Broglie, Heisenberg, Schrödinger, Born, Einstein and others
Quantum Mechanics
Based on the work of de Broglie, Heisenberg, Schrödinger, Born, Einstein and others
All matter behaves with both particle and wave nature
Quantum Mechanics
Based on the work of de Broglie, Heisenberg, Schrödinger, Born, Einstein and others
All matter behaves with both particle and wave nature
The smaller a particle is, the more closely its behavior approaches a wave
Quantum Mechanics
Based on the work of de Broglie, Heisenberg, Schrödinger, Born, Einstein and others
All matter behaves with both particle and wave nature
The smaller a particle is, the more closely its behavior approaches a wave
Quantum wave equations give probability of finding an electron in a particular energy level (orbital)
