NTNUJAVA Virtual Physics Laboratory
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Easy Java Simulations (2001- ) => modern physics => Topic started by: ahmedelshfie on April 09, 2010, 07:00:55 pm



Title: Bragg's Law and Diffraction
Post by: ahmedelshfie on April 09, 2010, 07:00:55 pm
This applet created by Prof Hwang
Modified Interface by my self
Original simulation:Bragg's Law and Diffraction (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1020)


Title: Re: Bragg's Law and Diffraction
Post by: ahmedelshfie on June 26, 2010, 12:41:53 am
Bragg diffraction (also referred to as the Bragg formulation of X-ray diffraction) was first proposed by William Lawrence Bragg and William Henry Bragg in 1913 in response to their discovery that crystalline solids produced surprising patterns of reflected X-rays (in contrast to that of, say, a liquid). They found that in these crystals, for certain specific wavelengths and incident angles, intense peaks of reflected radiation (known as Bragg peaks) were produced. The concept of Bragg diffraction applies equally to neutron diffraction and electron diffraction processes.
W. L. Bragg explained this result by modeling the crystal as a set of discrete parallel planes separated by a constant parameter d. It was proposed that the incident X-ray radiation would produce a Bragg peak if their reflections off the various planes interfered constructively.