Sunday, May 22, 2011

Quantam Physics

Quantum mechanics (according to wiki) is the body of scientific principles which attempts to explain the behavior of matter and its interactions with energy on the scale of atoms and atomic particles.

Just before 1900, it became clear that classical physics was unable to model certain phenomena. Coming to terms with these limitations led to the development of quantum mechanics, a major revolution in physics. This article describes how the limitations of classical physics were discovered, and the main concepts of the quantum theories which replaced them in the early decades of the 20th Century.[note 1] These concepts are described in roughly the order they were first discovered; for a more complete history of the subject, see History of quantum mechanics.

Some aspects of quantum mechanics can seem counter-intuitive, because they describe behavior quite different than that seen at larger length scales, where classical physics is an excellent approximation. In the words of Richard Feynman, quantum mechanics deals with "nature as she is — absurd."[1]

Many types of energy, such as photons (discrete units of light), behave in some respects like particles and in other respects like waves. Radiators of photons (such as neon lights) have emission spectra which are discontinuous, in that only certain frequencies of light are present. Quantum mechanics predicts the energies, the colors, and the spectral intensities of all forms of electromagnetic radiation.

But quantum mechanics theory ordains that the more closely one pins down one measure (such as the position of a particle), the less precise another measurement pertaining to the same particle (such as its momentum) must become. Put another way, measuring position first and then measuring momentum does not have the same outcome as measuring momentum first and then measuring position; the act of measuring the first property necessarily introduces additional energy into the micro-system being studied, thereby perturbing that system.

Even more disconcerting, pairs of particles can be created as entangled twins — which means that a measurement which pins down one property of one of the particles will instantaneously pin down the same or another property of its entangled twin, regardless of the distance separating them — though this may be regarded as merely a mathematical, rather than a real, anomaly.

6 comments:

rutimizrachi said...

You are entertaining. You are deep. You are very good. You are many things. You are not crazy.

the sabra said...

...but for the record, I politely disagree :)

rutimizrachi said...

Your mother will be proud of your politeness; but she will likely agree with me. Quirky, yes. Crazy, no.

the sabra said...

"No human commits a sin unless a spirit of folly (Shtus) enters him", teach our Sages.

rutimizrachi said...

Well, get it OUUUUUT, then.

the sabra said...

teeheehee
okay
done!

(only after riddance, could i recognize..hence the post:)