Uncertainty principle

Click to see animation. The evolution of an initially very localized gaussian wave function of a free particle in two-dimensional space, with colour and intensity indicating phase and amplitude. The spreading of the wave function in all directions shows that the initial momentum has a spread of values, unmodified in time; while the spread in position increases in time: as a result, the uncertainty Δx Δp increases in time.

The superposition of several plane waves to form a wave packet. This wave packet becomes increasingly localized with the addition of many waves. The Fourier transform is a mathematical operation that separates a wave packet into its individual plane waves. Note that the waves shown here are real for illustrative purposes only, whereas in quantum mechanics the wave function is generally complex.

Plane waveWave packetPropagation of de Broglie waves in 1d—real part of the complex amplitude is blue, imaginary part is green. The probability (shown as the colour opacity) of finding the particle at a given point x is spread out like a waveform, there is no definite position of the particle. As the amplitude increases above zero the curvature reverses sign, so the amplitude begins to decrease again, and vice versa—the result is an alternating amplitude: a wave.

In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables, such as position x and momentum p, can be known simultaneously.

单词	Heisenberg uncertainty relation
释义	Heisenberg uncertainty relation 英语百科 Uncertainty principle In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables, such as position x and momentum p, can be known simultaneously.
随便看	evaporated line的意思 evaporated liquor的意思 evaporated make up的意思 evaporated, materials的意思 evaporated metal的意思 evaporated milk的意思 evaporated milk factory的意思 evaporated milk formula的意思 evaporated milk的意思 evaporated milk,unsweetened的意思 evaporated mollasses residue的意思 evaporated neutron的意思 evaporated oxide film的意思 evaporated quantity of water的意思 evaporated residue的意思 evaporated sample liquid activity meter的意思 evaporated skimmed milk的意思 evaporated vagetable的意思 evaporated vegetable的意思 evaporated volume的意思 evaporated washing frame的意思 evaporated waste的意思 evaporated whole milk的意思 evaporate into的意思 evaporate milk的意思

Heisenberg uncertainty relation

Uncertainty principle