Sree Narayana Guru College of Engineering and Technology 2005 EN2K 103B : ENGINEERING PHYSICS(B) (For ME), Improvement test - - Question Paper

Improvement test - May 2005

EN2K 103B : ENGINEERING PHYSICS(B)
(For ME)

Time: 2Hours Marks: 50

Part A: ans all ques.

1 define stress-optic legal regulations
2 discuss Laue’s experiments on X-ray diffraction and mention its significance
3 What is the significance of reverberation time in the design of an auditorium
4 find the expressions for Einstein coefficients
(4x5=20)


Part B: ans 3 ques.


5 discuss the working of ruby laser and semiconductor diode laser

OR

6 (a) What is a hologram? elaborate the special features of a hologram over a photograph?
(b) compute the energy difference in eV ranging from 2 energy levels of neon atoms of a He-Ne gas laser, the transition ranging from which outcomes in the emission of light of wavelength 632.8nm

7 describe standard time of reverberation. Derive Sabine’s formula for the standard time of reverberation. Mention the assumptions made.

OR

8 Write notes on the subsequent
(a) Radiographic method of nondestructive testing
(b) Ultrasonic method of nondestructive testing


9 Derive Bragg’s legal regulations of X-ray diffraction. discuss Bragg’s X-ray spectrometer and how will you determine the wavelength of light used

OR

10 What is piezoelectric effect? discuss with a circuit diagram, the generation of ultrasonics using a piezoelectric oscillator. elaborate the important applications of ultrasonics

Earning:   Approval pending.