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B
Meg: Noa ಷಸ ಸಾ ना ‏اد کے مھا‎ தவத தகக ககக
SECOND SEMESTER B.TECH, DEGREE EXAMINATION, MAY/JUNE 2016
PH 100 : ENGINEERING PHYSICS
Max. Marks : 100 Duration : 3 Hours

PART—A
Answer all questions. Each question carries 2 marks.
1. Distinguish between free oscillation and damped oscillation.
2. State the laws of transverse vibrations of a stretched string.
3. What do you mean by optical path ?
4. What is grating element © Write the grating equation in terms of grating element.

5. What is a Retardation plate ? Write the expression for the thickness of a QWP
and HWP.

6. What is DC Josephson effect ?

7. How do you account for the natural line broadening on the basis of Heisenberg’s
Uncertainty principle ?

8. What do you mean by Fermi energy level and Fermi energy ?
9. Distinguish between reverberation and echo.
10. How ultrasonic waves are detected by thermal method ?
11. How population inversion is achieved in Ruby laser ?
12. Explain the principle of propagation of light through an optical fibre. (12x2=24)