x ray defraction.
Defination-
x ray diffraction are electromagnetic wave just like as light wave diffraction effect can be observed one if the spacing between line ruled on the grating is the order of magnitude of the wavelength of light used in 1912.
Leus suggest that the Crystal can be used for diffraction of X-Ray because the spacing between the atoms of a crystal are the order of one Angostrom. the deflecting a centre in the Crystal are not in one plan and thus The crystal is 3D expressing grating
Leu's experiment -
leaves suggest that if x ray are allotted to pass through a crystal 3D diffraction pattern is obtained the experimental arrangement is shown in the figure.
x-ray obtained from x-ray tube reduced to narrow fine pencil beam passing through slit S1 and S2.
The Beam is allowed to passing through the crystall of ZnS and the emergent ray is received on the photographic plate the diffraction pattern so, obtained consisting of a Centre spot and series of spots arranged in a different pattern about this center spot. This pattern known as braggs pattern.
Braggs experiment has established the following two important facts
1) x ray are electromagnetic wave of short wavelength
2) the atom of the Crystal are arranged in a regular 3D
uses of experiment
This is used to determine the microscopic structure of metal in solid state.
it is used for determine the angular relationship between different plan in a crystal lattice which are rich in atomy
Bragg law
Bragg experement-
braggs Express spectrometric consists of X-Ray tube which produce x-ray the X-ray are co limited by two slits S1 and S2 the big is now allowed to fall on the Crystal sea mountain on the circular table which can be determined by the word near the onethe reflected beam then pass through the slit is 3 and in ionization chamber and adjacent chamber isionization chamber is container 4 gas Ayyappa with 2 electrode the position of ionization chamber can be determined by second one year V2 the ionization chamber is used to measure ionisation current
when crystal is turn angle then the ionization chamber trans to angle 2 theta defected Bean is recorded by the ionization chamber connected to the electromittayi ki the ionization current is measure for different value for glancing angle theta the graph for ionisation current and glancing angle1 input as shown in figure
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