Quantum World Flashcards
Who did the double split experiment?
Thomas Young
What does the double split experiment prove for light?
That light can act as a wave.
What colapses when looking at the path a photon or an electron takes through the splits?
The wave function.
What does Heisenberg’s uncertainty principle refer to?
Position and velocity cannot both be measured accurately. When one is measured, the wave length of the other collapses.
What did de Broglie prove?
Particles can also behave like waves.
De Broglie’s wavelength?
lambda = h/mv
How can you get the probability to find a particle at position x?
It is the square of the wave function that obeys Shrodinger’s equation.
Heisenberg’s uncertainty principle?
Δx*Δp > ℏ
What is superposition?
Adding wave functions together
What is nonlocality?
Instantaneous communication between distant objects
Entanglement
Shared wavefunction of multiple particles
What is decoherence?
The change in phase between two wave functions that are in superposition.
Copenhagen interpretation
We should only talk of what we see (without looking behind the quantum curtain since we affect the results every time we do that)
The de Broglie - Bohm interpretation
The particle passes through one of the slits, but its position is altered after passing resulting in the weird pattern.
The Many-Worlds interpretation
All possible realities co-exist in multiple universes. The universes overlap only at the level of the single atom.
