This document discusses various physics concepts including Heisenberg's uncertainty principle, electron focusing in nuclear sectors, p-n junctions in LEDs, anomalous dispersion in 3-level and 4-level laser systems, torque in metals and semiconductors related to resistivity and the photoelectric effect, mode locking and pointer lasers in FEL systems, population inversion and nonlinear optics such as second harmonic generation and holograms. It also mentions speckle patterns, Pauli exclusion, Compton scattering, normalization of wave functions, chaos theory, and that the author of the document is Qahtan G. Al-zaidi with a Ph.D. obtaining their degree in January 2009.

1. – –
expectation value
electron focusing Nuclear sector
Heisenberg’s Uncertainty
LED
donor p-n junction
acceptor
n n
-
anomalous dispersion
3-level laser system 4-level laser system
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2. 4-level 3-level He-Ne
Torque
metals and semiconductors T resistivity
photoelectric effect
activation energy
mode locking
pointer laser
FEL laser pop. Inversion
nonlinear optics
S.H.G
Hologram
speckle pattern
Pauli a.m.u
Compton
scattering
I
eV
S.H.M
t r Wave function Normalization
chaos theory
Ph.D. Qahtan G. Al-zaidi
January , 2009
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3. 3