two-slit interference
1.origin
2.Theoretical basis
3.Double-slit interference experiment
4.（不知）
In 1807, Thomas Yang summary published his "natural philosophy, of his inside in the work, and optics in first described him that tells of the experiment: light a double-slit interference. Later, the experiments prove the history can completely in the history of physics is the most classical before the five experiments in today, it has appeared in every one middle school physics textbooks.
Let us consider this a "prototype" quantum mechanics experiments. A beam of light or other electronic or type of "particle -- wave" through the dual slit shot to the screen behind. In order to determine the reasons, we ran doing experiments. According to the nomenclature, usually called photons light quantum ". Light as particles (i.e. photons) present most clearly happened on the screen. In light of the division of the locality, the unit of energy arrive there in accordance with the formula of energy E = PuLang grams and frequency proposed.and constant. Never received "half" (or any part of the photon energy, light receiving is unit of photons. Totally have or no. Only integer a photon was observed.
Parallel monochromatic onto a two slits in the baffle, slit are located very close, parallel light waves will also spread to slit, they became two vibration condition was always the same, their light waves in the space behind a baffle superimposition, the interference phenomenon.
Added concept: when monochromatic after double seam, produced in the screen and the interference fringes alternate. When the screen with two slits somewhere the journey is wavelength integer times, two wave peaks and troughs, troughs form bright, stripe. When the screen with two slits somewhere in the journey is half the wavelength of the odd times, in the place with a trough superimposition, wave amplitude of light and dark stripes cancel each other out.