انت هنا الان : شبكة جامعة بابل > موقع الكلية > نظام التعليم الالكتروني > مشاهدة المحاضرة

Chapter Three: Wave particle duality

Share |
الكلية كلية التربية للعلوم الصرفة     القسم قسم الفيزياء     المرحلة 3
أستاذ المادة فؤاد عطية مجيد       13/12/2016 21:23:50
3.1 De Broglie hypothesis
An important step in the development of a satisfactory quantum theory
occurred when Louis de Broglie in 1929 in his PhD work postulated that:
1- Nature is strikingly symmetrical.
2- Our universe is composed entirely of light and matter.
3- If light has a dual wave-particle nature, perhaps matter also has this
nature.

Heisenberg uncertainty principle

In quantum mechanics, the Heisenberg uncertainty principle states that certain
pairs of physical properties, like position and momentum, cannot both be
known to arbitrary precision. That is, the more precisely one property is
known, the less precisely the other can be known. According to the uncertainty
principle, it is, for instance, impossible to measure simultaneously both
position and velocity of a microscopic particle with any degree of accuracy or
certainty.
Single slit experiment
In this section we will discuss the nature of the Fraunhofer diffraction pattern
produced by a single slit. Some important features of this problem can be deduced by
examining waves coming from various portions of the slit, as shown in Figure (3.1).
According to Huygens principle, each portion of the slit acts as a source of waves. Hence,
light from one portion of the slit can interfere with light from another portion, and the
resultant intensity on the screen will depend on the angle

المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
download lecture file topic