Diffraction by solids, Chemistry

Assignment Help:

DIFFRACTION BY SOLIDS

Diffraction performs when a wave interacts with a lattice whose dimensions are of the same order of magnitude as that of the wavelength of the waves. The lattice scatters the radiation, and the scattered radiation from one point interferes with the radiation from others so as to either reduce it (destructive interference), or enhance the amplitude of the radiation (constructive interference). The pattern of destructive and constructive interference yields information about molecular and crystal structure.

1228_diffraction by solid.png

 

Fig.1. Constructive (a) and destructive (b) interference of two

waves.

In the case of solids, this wavelength must be of the same order as the crystal lattice spacing (ca. 0.1nm), and there are three primary types of radiation which are used for structural studies of solids. The most commonly used radiation, X-rays, have wavelengths of the order of 0.15 nm, and in the course of diffraction studies are scattered by the electron density of the molecule.


Related Discussions:- Diffraction by solids

Name of the complex anion, Q. Name of the complex anion? The name of th...

Q. Name of the complex anion? The name of the complex anion always ends in 'ate' and the Latin name of the metal atom is used. No specific ending is used for neutral or cationi

Properties of nitrophenols, Properties of Nitrophenols:  O-Nitrophenol ...

Properties of Nitrophenols:  O-Nitrophenol is a yellow in colour crystalline compound, whereas m- and p-isomers are colourless crystalline compounds. Isomer             orth

A moving particle may have wave motion, A moving particle may have wave mot...

A moving particle may have wave motion, if: (1) Its mass is very high (2) Its velocity is negligible (3) Its mass is negligible (4) Its mass is very high and velocity

Refining of petroleum, Refining of petroleum: Petroleum (crude) extract...

Refining of petroleum: Petroleum (crude) extracted from earth's crust is an intimate mixture of many organic compounds. Crude petroleum needs to be purified and its components

Methods of extraction., defind:smulting, rosting,physical and chemical meth...

defind:smulting, rosting,physical and chemical method

Determine energy change and change of state, The specific heat of a substan...

The specific heat of a substance is the amount of energy required to raise one gram of the material by one degree centigrade. But what happens if you get an ice cube too hot?  It i

Define matrix of the mitochondrion., Write down the complete names and the ...

Write down the complete names and the commonly used abbreviations of the molecules A and B. a) Illustrate the line bond structures of the reactive moieties of these molecules i

Chemical reaction, How is chemical reaction reversible and irreversible?

How is chemical reaction reversible and irreversible?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd