Cochin University of Science and Techology (CUST) 2007-1st Year B.Tech engineering physics - exam paper

MODEL exam –APRIL 2007
ENGINEERING PHYSICS
Time:3Hrs Max marks:100



PART A

1. What is the difference b/w interference & diffraction of light?

2. For a plane diffraction grating with 5000 lines per cm used at normal incidence.
1.What is the largest wavelength of light for which a spectrum can be observed?
2. For wave length of 6000 angstrom what is the highest order of the spectrum that
can be observed?

3. What is packing factor& unit cell?

4. discuss the principle of holography.

5. State& discuss Heisenberg’s uncertainty principle.

6. discuss Vector atom model & its concepts.

7. What is dispersive power of a grating? find an expression for dispersive power.

8. compute the thickness of a quarter wave plate for light of wavelength 5896 angstrom.
The refractive indices for ordinary & extra ordinary rays being 1.54& 1.55
respectively.

PART B

9. define the theory , construction & working of Michelson’s interferometer .How can
it used to measure length?

OR

10. What is optical activity ? discuss Laurent’s half shade polarimeter.

11. Outline the principle & working of He- Ne laser? What is stimulated emission? How
does it differ from spontaneous emission?
OR

12. What is the principle of optic fibre?

13. Derive the Schrondinger time independent formula.
OR
14. discuss the working & construction of nuclear reactors. Mention the properties of
nucleus .

15. discuss the production of X –ray. What is Bragg’s law& discuss the diffraction of
X- rays by crystals?
Or

16. a) discuss the classification of semiconductors.

b) discuss various kinds of superconductors.

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Earning:   Approval pending.