M.SC. Physics (Materials Science) (Semester II) (CBCS)
Examination, 2017
Analytical Techniques
Day Date: Saturday, 29-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: and are compulsory.
Answer any three questions from Q.3 to Q.7.
Q.1 Objective questions. 14
Choose correct alternative:
In case of hexagonal crystal system
90 60 120 80
FT-IR uses a laser as an internal wavelength standard.
He-Ne YAG He-Hg Ne-Hg
In case of tetragonal crystal
a b c a b c c a b=c
In case of rhombohedral crystal system
120 90 120 90
The K.E. of electron in XPS is dependent on
Of sample Of spectrometer
vacuum level of sample vacuum level of spectrometer
In XPS, photoelectrons are produced
X-rays -rays -rays -rays
The range of Far IR is t
0.025-0.5mm 0.25-5mm
0.25-0.5mm 0.025-5mm
IR absorption occurs due to
Change in electron configuration
Symmetric vibrations
Asymmetric vibrations
None of above
Fill in gaps 03
Number of atoms per unit fcc system are
The indices 1 are coefficient of a vector
perpendicular to that plan.
The interplaner distance increases hkl.
Page 2 of 2
State True False 03
Number of atoms per unit primitive cell depends on the type of
crystal system.
In case of tetragonal crystal system a b c.
Number of atoms per unit bcc system are 4.
Q.2 Attempt the following 14
Determine re ciprocal lat tice vectors for SC crystal structure. 5
Give the applications of Raman spectroscopy. 5
What is crystal symmetry and reciprocal lattice? 4
Q.3 What do you mean by lattice? How many different crystals systems
are possible in nature i.e. the lattice could be extended in three
dimensions?
10
Show basic unit cell, define vectors c or and angles
04
Q.4 Describe basic principle and instrumentation for the XPS system. 10
Write note on Energy losses in XPS 04
Q.5 Draw and explain instrumentation set of FTIR spectroscopy. 10
Draw and explain energy levels in Infra red absorption. 04
Q.6 Describe basic instrumentation setup for UV-VIS spectro
photometer.
10
Explain Source of UV and VIS radiations. 04
Q.7 Explain basic principle and instrumentation of Raman
Spectroscopy.
10
Write a note on Stoke's and Anti Stokes lines Raman spectrum. 04