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In physics and systems theory , the **superposition principle** [ 1 ] , also known as **superposition** property , states that, for all linear systems , the net response at a given place and time caused by two or more stimuli is the sum of the responses which would have been caused by each stimulus

the overlap energy of the states is nullified, and the expectation value of an operator (any **superposition** state) is the expectation value of the operator in the individual states, multiplied by the fraction of the **superposition** state that is "in" that state. An example of a directly

**wikipedia.org** | 2011/9/23 0:45:55

The law of **superposition** (or the **principle** of **superposition** ) is a key axiom based on observations of natural history that is a foundational **principle** of sedimentary stratigraphy and so of other geology dependent natural sciences : “ Sedimentary layers are deposited in a time

large plates of the Earth's crust is the cause of folded strata . As one of Steno's Laws, the **Principle** of Original Horizontality served well in the nascent days of geological science . However, it is now known that not all sedimentary layers are deposited purely horizontally. For instance

illustrates MacIntyre's science-fiction story "Schrödinger's Cat-Sitter". The cat occupies a quantum **superposition** relative to the tined object , being simultaneously in front of and behind the object, which itself occupies a quantum **superposition** because it is simultaneously a square-edged

In quantum mechanics , the Heisenberg uncertainty **principle** states a fundamental limit on the accuracy with which certain pairs of physical properties of a particle, such as position and momentum , can be simultaneously known. In other words, the more precisely one property is measured,

**wikipedia.org** | 2011/10/4 4:46:24

In physics , the correspondence **principle** states that the behavior of systems described by the theory of quantum mechanics (or by the old quantum theory ) reproduces classical physics in the limit of large quantum numbers. The **principle** was formulated by Niels Bohr in 1920, [ 1 ] though

**wikipedia.org** | 2011/4/23 11:08:34

The Pauli exclusion **principle** is the quantum mechanical **principle** that no two identical fermions (particles with half-integer spin ) may occupy the same quantum state simultaneously. A more rigorous statement is that the total wave function for two identical fermions is anti-symmetric

**wikipedia.org** | 2011/8/9 10:34:38

2.1.1 Approximations 2.1.2 Reflections 2.1.3 Refractions 2.2 Physical optics 2.2.1 **Superposition** and interference 2.2.2 Diffraction and optical resolution 2.2.3 Dispersion and scattering 2.2.4 Polarization 3 Modern optics 3.1 Lasers 4 Applications 4.1 Human

5 Development of modern quantum mechanics 6 Copenhagen interpretation 6.1 Uncertainty **principle** 6.2 Wave function collapse 6.3 Eigenstates and eigenvalues 6.4 The Pauli exclusion **principle** 6.5 Application to the hydrogen atom 7 Dirac wave equation 8 Quantum entanglement