What are crystal imperfections Mention any two significance of it .
Concept: Introduction to Crystallography
An ultrasonic pulse of 0.09M Hz sends down towards the sea-bed which returns after 0.55 seconds. The velocity of ultrasonic waves in sea water is 1800 m/sec . calculate the depth of sea and wavelength of ultrasonic pulse.
Concept: Ultrasonic Wave Generation
Draw the following : (1,-1,3) ,(2,0,0) , [0,0,-1]
An electron is accelerated through 1200 volts and is reflected from a crystal. The second order reflection occurs when glancing angle is 60°. Calculate the inter planar spacing of the crystal.
Concept: Introduction to Crystallography
Discuss any three applications of Ultrasonic waves
Concept: Ultrasonic Wave Generation
State Heisenberg's Uncertainty Principle. Show that electron doesn'texist in
the nucleus.Find the accuracy in the position of an electron moving with speed 350
m/sec with uncertainty of 0.01%.
Concept: Introduction to Quantum Mechanics
Explain Point defects in crystals.
Concept: Introduction to Crystallography
What is reverberation time? Discuss sabine formula.
Concept: Reflection of Sound(Reverberation and Echo)
State ‘magnetostriction effect’. Mention any two application of ultrasonic waves
Concept: Magnetostriction Oscillator
Draw and explain the unit cell of sodium chloride (NaCl) crystal determine effective number of NaCl molecule per unit cell and co-ordination number.
Concept: Study of characteristics of unit cell of Diamond, ZnS, NaCl and HCP;
State any five factors affecting the acoustics of the building and give the remedies for each.
Concept: Reflection of Sound(Reverberation and Echo)
Calculate the critical radius ratio of an ionic crystal in ligancy-6 . what is the maximum size of cation in ligancy 6 configuration when size of anion is 2.02A°?
Concept: Study of characteristics of unit cell of Diamond, ZnS, NaCl and HCP;
Draw the unit cell of HCP structure and work out the no. of atoms per unit cell.
Concept: Study of characteristics of unit cell of Diamond, ZnS, NaCl and HCP;
What is the principle of solar cell? Write its advantages and disadvantages
Concept: Study of characteristics of unit cell of Diamond, ZnS, NaCl and HCP;
Explain the factors on which reverberation time depends .
Concept: Reflection of Sound(Reverberation and Echo)
Find the following parameter for DC(Diamond Cubic) structure:-
⦁ No. of atoms per unit cell.
⦁ Co-ordination number.
⦁ Nearest atomic distance.
⦁ Atomic radius.
⦁ APF.
Concept: Study of characteristics of unit cell of Diamond, ZnS, NaCl and HCP;
A classroom has dimension 10×8×6m3. the reverberation time is 3 sec. calculate the total absorption of surface and average absorption.
Concept: Reflection of Sound(Reverberation and Echo)
Explain the principle, construction and working of a Magnetostriction Oscillator.
Concept: Magnetostriction Oscillator
