MODERN PHYSICS

PH 241                                                                                  No. of hrs/week = 04+03

                                                                                    No. of credits  = 05

Relativity:                                                                                                            [15 Hrs]

Classical relativity, Michelson-Morley experiment, special relativity – postulates and consequences, time dilation, length contraction, relativistic Dopper-shift, Lorentz transformation, velocity addition theorem, relativistic momentum and energy and their conservation.

Quantum theory of light:                                                                                                           [5 Hrs]

Black body radiation, Rayleigh – Jeans law and Planck’s law, photoelectric effect, Compton effect.                                                                                                                 

Interaction of electromagnetic radiations with matter:                                                   [6 Hrs]

Mechanisms of the absorption of electromagnetic radiations by matter (photoelectric effect, Compton-effect, pair-production)

Particle nature of matter:                                                                                                                       [5 Hrs]

Composition of atoms, the Bohr-atom

Matter waves:                                                                                                                     [4 Hrs]

Davisson-Germer experiment, matter waves, wave packet, uncertainty principle, wave-particle duality.

Quantum Mechanics:                                                                                        [4 Hrs]

Wave function, Schrodinger-equation, particle in a box, finite square well potential barrier tunneling, simple harmonic oscillator.

Atomic Structure:                                                                                                                          [3 Hrs]

X-ray spectra and Moseley’s law.

Nuclear Structure:                                                                                                                                 [4 Hrs]

Binding energy, nuclear forces, radioactivity, a-decay, b-decay, g-decay.

Text / Reference:       Physics for Scientists and Engineers with Modern Physics,

                        Part 5,

            6th Edition (2004);

            R.A.Serway and J.W.Jewett;

            Brooks/cole, Div. Harcourt College Publishers.

PH 241  MODERN PHYSICS( LABORATORY )

1.  Determination of Planck's constant and photoelectric work function of the photo cathode, by photoelectric effect experiment using photo emissive cell.

2. Determination of band-gap energy by resistivity measurement on semiconductors at different temperatures using four-probe method.

3.  Study of various characteristics of p-n junctions.

4.  X-ray characterization of cubic crystals by powder X-ray diffraction

method.

5.  Study of the characteristics of Geiger-Miller tube and GM-pulses

6.  Determination of dead-time and resolution-time of GM-tube by  double source method

         7. Determination attenuation coefficients of lead/aluminium for gamma

    rays, using GM-counter.

8. Experimental verification of inverse-square law for gamma-rays, using GM-counter.

9. Determination of long half-life for beta-emission process in K-40 (KCI ),       using GM counter.

10. Study of counter statistics using GM-counter.

11. Calibration and energy analysis of the given gamma-source using y-ray spectrometer.

12. Characteristics X - ray spectrum of Copper.

Daune - Hunt Law and Calculation of 'h'.