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FIFTH SEMESTER (CBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2022
Physics/Applied Physics
PHY 5B 07/APH 5B 07—QUANTUM MECHANICS
(2019 Admission onwards)
Time : Two Hours Maximum : 60 Marks
The symbols used in question paper have their usual meanings.
Section A (Short Answer Type)

Answer all questions in two or three sentences.

Each correct answer carries a maximum of 2 marks.
1. Plot the radiancy versus wavelength spectrum of a blackbody for two different temperatures.
2. Whatis the origin of the unmodified peak in the Compton spectrum ?
3. List any four basic properties of photons.
4. Explain Ritz combination principle.
5. What was the purpose of Davisson-Germer experiment ?
6. Explain the principle of complementarity.
7. Explain how the amplitude of de Broglie wave related to the probability of finding the particle.
8. Discuss the probability interpretation of wavefunction.

9. Give an expression for the energy eigen values of a one-dimensional simple harmonic oscillator.
How is it different from that of a particle in a box, in terms of the spacing ?

10. Discuss the ammonia inversion problem using quantum mechanical tunneling.
11. Explain the result of Stern-Gerlach experiment using a suitable example.
12. What is Bohr magneton ? What is its value ?

(Ceiling 20)

Turn over

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