KALASALINGAM UNIVERSITY
Title: physics-I
Time: 180 minutes
Subject code: PHY121
Maximum marks: 100 marks
END SEMESTER
PART-A (10*2=20 marks)
1.
2.
3.
4.
What is population inversion?
Compute the critical angle of fiber having refractive index of core=1.5 and cladding=1.45
Define loudness
Calculate the inter planar distance for (3 2 1) plane in a simple cubic with inter atomic spacing
equal to 4.5A0.
5. Calculate the De-Broglie wavelength of velocity 106 m/s
6. Mention the physical significance of wave function.
7. Define magneto striction effect.
8. What are the application of magnetic particle testing method
9. Define the specific heat capacity of a substance.
10. What is nuclear fusion?
PART-B (5*16=80 marks)
11. a. (i) Explain the principle, construction, working and application of Ruby laser. (10 marks)
11a. (ii) Write short note an (i) construction of hologram (ii) Reconstruction of hologram (6 marks)
OR
11b. (i) Describe the classification of optical fiber based on material and propagation of modes (10 marks)
11b. (ii) Give an account of (i) Temperature sensor (ii) Displacement sensor
(6 marks)
12a (i) Prove that the total absorption of the energy in the entire hall is (EVA/4) using Sabine’s
Assumption
(8 marks)
12a (ii) What are the common acoustical defect and their remedies?
(8 marks)
OR
12b (i) Show that the packing factor of HCP and FCC are equal
12b (ii) What are Miller indices? Give their significance
(10 marks)
(6 marks)
13a (i) Based on the quantum concepts derive the plank’s radiation formula
(8 marks)
13a (ii) Derive Schrodinger’s time independent wave equation.
(8 marks)
OR
13b (i) Explain the application of Schrodinger wave equation to a one dimensional box (8 marks)
13b (ii) Describe an experiment to verify Compton effect
(8 marks)
14a (i) Explain how ultrasonic waves can be produced by piezo electric effect
(10 marks)
14a (ii) Briefly explain any two industrial application of ultrasonic
(6 marks)
OR
14b (i) Explain in detail the procedure of liquid penetrant inspection
(10 marks)
14b (ii) Draw a block diagram of ultrasonic flaw detector and explain the function of each one
of its components.
(6 marks)
15a (i) Describe with theory of specific heat capacity of solid by method of mixture.
(8 marks)
15a (ii) Describe with theory of Forbe’s method of determination of thermal conductivity
of good conductor.
(8 marks)
OR
15b (i) Explain in detail proton-proton cycle and carbon-nitrogen cycle
(8 marks)
15b (ii) Explain in detail proportional counter working in detection of nuclear radiation (8 marks)
*********All the best*********