Bragg’s spectrometer method:
This technique is one of the significant methods for studying crystals employing X-rays. The apparatus comprises of X-ray tube from which a narrow beam of X-rays is permitted to fall on the crystal mounted on a rotating table. The rotating table is given with scale and vernier, from which the angle of incidence, θ can be calculated.
Figure: X-ray spectrometer
An arm that is rotating around similar axis as the crystal table carries an ionisation chamber. The rays reflected from the crystal come into the ionisation chamber and ionise the gas present within. Due to the ionisation, current is produced that is measured by electrometer. The current of ionisation is a direct measure of intensity of reflected beam from the crystal. For various angles of incidence, the corresponding ionisation current is calculated from the electrometer. Such values are plotted in the form of graph.
For sodium chloride, the maximum reflection or peaks for 100 plane taken at θ = 5.9°, 11.85° & 18.15°. The sines of such angles are 0.103, 0.205 and 0.312 that are in the ratio 1:2:3. These peaks symbolize the first, second and third order reflections. The ratio verifies the rightness of Bragg’s equation.
Latest technology based Chemistry Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Solid State homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Solid State, project ideas and tutorials. We provide email based Solid State homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Solid State. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Physical-Chemistry Homework Help and assignment help services. They use their experience, as they have solved thousands of the Chemistry assignments, which may help you to solve your complex issues of Solid State. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.