Quantum & Atomic Physics
6 terms
Balmer Series
Quantum & Atomic Physics
Visible Light Wavelengths (nm)
The spectral series of hydrogen atom emission lines resulting from electron transitions dropping from higher levels (n_i ≥ 3) to the n=2 level.
1 / λ = R_H (1 / 2² - 1 / n_i²), n_i = 3, 4, 5...
Bell's Theorem
Quantum & Atomic Physics
Dimensionless Inequality
A mathematical theorem proving that no physical theory incorporating local hidden variables can reproduce all predictions of quantum mechanics.
|E(a, b) - E(a, b')| + |E(a', b) + E(a', b')| ≤ 2
Bohr Model
Quantum & Atomic Physics
eV (Energy), m (Orbit Radius)
An early semi-classical atomic model proposing that electrons orbit the atomic nucleus only in discrete stationary orbits with quantized angular momentum.
L = m v r = n ℏ, E_n = -13.6 eV / n²
Bose-Einstein Condensate (BEC)
Quantum & Atomic Physics
nK (Nanokelvin Temperatures)
A state of matter formed by bosons cooled close to absolute zero, where a macroscopic fraction of particles collapse into the lowest quantum state.
T_c = (2 π ℏ² / (m k_B)) (n / ζ(3/2))^(2/3)
Bosons
Quantum & Atomic Physics
Dimensionless Particle Class
Subatomic particles possessing integer intrinsic spin that obey Bose-Einstein statistics and do not obey the Pauli Exclusion Principle.
Spin = 0, 1, 2...
Bragg's Law
Quantum & Atomic Physics
m or nm (Wavelength and Spacing)
The mathematical condition for constructive interference of waves scattered from parallel atomic lattice planes in a crystal.
n λ = 2 d sin θ