Anna University Chennai B.E Engineering Physics Ph2111 - engineering physics-i 2010 Question paper

B.E/B.TECH DEGREE EXAMINATION,JANUARY 2010
FIRST SEMESTER
PH 2111-ENGINEERING PHYSICS-I
(REGULATION 2008)

PART A( 10X2=20 MARKS )

1. what is cavitation?

2. what is sonogram?.

3. what are the different methods of achieving population inversion?

4. distinguish between homo junction and hetero junction semiconductor lasers.

5. A signal of 100 mW is injected into a fiber.The out coming signal from the other end is 40 mW.Find the loss in dB.

6. what is meant by splicing in fiber optics?

7. calculate the equivalent wavelength of electron moving with a velocity of 3 x 10^7 m/s.

8. what is Compton effect?write an expression for the Compton wavelength.

9. for a cubic crystal draw the planes with miller indices(110)and(001).

10. What are Frenkel and Schottky imperfections?


PART B-(5 X 16=80)

11.
i. explain how ultrasonic waves can be produced by using magnetostriction method.
ii. write any four applications of ultrasonic waves.

Or

12.in ultrasonic NDT what are the three different scan displays in common use?explain.

13.
i. for atomic transitions,derive Einstein relations and hence deduce the expressions for the ration of spontaneous emission rate to the stimulated emission rate.

Or

14. what is holography?describe the construction and reconstruction methods of a hologram.

15.
i. how are fibers classified?explain the classifications in detail.

ii. explain double crucible method of fiber manufacturing.

Or

16.
i. explain the construction and working of displacement and temperature fiber optic sensors.

ii. explain the construction and working of fiber optic medical endoscope.

17.
i. write short notes on black body radiation.

ii. derive Plank's law of radiation.

Or

18.
i. what the principle of electron microscopy?compare it with optical microscope.
ii. with schematic diagram explain the construction and working of scanning electron microscope.

19.
i. explain the terms:atomic radius,coordination number and packing factor.
ii. show that the packing factor for face centered cubic and hexagonal close packed structures are equal.

Or

20.
i. what are miller indices?.
ii. derive an expression for the inter planar spacing for (hkl)planes of a cubic structure..
iii. calculate the inter planar spacing for(101) plane in a simple cubic crystal whose lattice constant is o.42 nm.