1
What is cavitation?

2 M

2
A nickel rod is used to produce ultrasonic waves of frequency f. if ultrasonic waves with frequency 2f are to be produced what should be the length of the nickel rod?

2 M

3
What is the function of helium atom in He-Ne laser?

2 M

4
Give any two differences between homo-junction and hetero-junction lasers?

2 M

5
For a step index optical fiber with a core of refractive index 1.48 and numerical aperture 0.649, calculate the refractive index of cladding?

2 M

6
What is the principle by which temperature is measured using a fiber optical sensor?

2 M

7
State Wien's displacement law?

2 M

8
An electron is constrained to a one dimensional potential box of 0.1 nm width. Obtain the first eigen value of the electron in electron volts (h=6.62x10

^{-34}) Js)
2 M

9
Give the cooordination number of BCC and FCC structures?

2 M

10
what is Schottky defects?

2 M

11.(a)(i)
What is inverse piezo-electric effect? Describe the method of producing ultrasonic waves by piezo-electric method.

10 M

11.(a)(ii)
Describe about any two methods using which ultrasonic waves can be detected?

6 M

11.(b)(i)
Give an account on the application of ultrasonic in?
Drilling

b) Welding

Cleaning

b) Welding

Cleaning

3 M

11.(b)(ii)
Explain the process of non destructive testing of materials using ultrasonic waves?

6 M

12.(a)(i)
describe the construction of Nd-YAG laser and using an energy level diagram explain the working of Nd-YAG laser.

10 M

12.(a)(ii)
Discuss about the different pumping schemes used to achieve population inversion in lasers?

6 M

12.(b)(i)
Describe the method of construction and reconstruction of images using holography?

10 M

12.(b)(ii)
Outline the use of lasers in welding and cutting of materials?

6 M

13.(a)(i)
Explain the principle and propagation of light through an optical fiber and obtain the expression for numerical aperture and acceptance angle?

10 M

13.(a)(ii)
Explain the working of fibre endoscope?

6 M

13.(b)(i)
With the help of block diagram explain the working of an optical communication system. What are its advantages over conventional wire systems?

10 M

13.(b)(ii)
Give an account on dispersion and bending losses in optical fibres?

6 M

14.(a)(i)
What is Compton Effect? Obtain an expression for Compton shift.

10 M

14.(a)(ii)
Describe briefly about the working of scanning electron microscope?

6 M

14.(b)(i)
Write Schrodinger's equation for a particle in a box. Solve it to obtain eigen values and eigen functions and show that they are discrete?

10 M

14.(b)(ii)
Obtain Rayleigh Jeans law from Planck a theory. Is Rayleigh Jeans law valid for all wavelengths?

6 M

15.(a)(i)
Explain the hexagonal closed packed structure and obtain its atomic packing factor?

10 M

15.(a)(ii)
Sodium chloride crystallizes in FCC structure. The density of sodium chloride is 2.18x103 Kg/m

^{3}. Calculate the distance between two adjacent atoms. The atomic weight of sodium and chlorine are 23 and 35.5 respectively?
6 M

15.(b)(i)
What is line defect? Explain edge dislocation using a neat diagram. What are positive and negative edge dislocations?

10 M

15.(b)(ii)
Describe the method of determining Miler indices of a given plane in a cubic lattice?

6 M

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