CSS 2021 Physics Paper I

(a) Describe Einstein's postulates of the special theory of Relativity. Express the difference between the special and the general theories of Relativity. (b) Establish the energy-mass relationship and give its significance.

(a) Differentiate between Fermi-Dirac, Bose-Einstein, and Maxwell-Boltzmann Statistics. Give the application of each. (b) Draw a labeled diagram of a nuclear reactor and give the significance of each part.

(a) Distinguish between linear and angular momentum. Express Newton's second law in terms of linear and angular motion. (b) Discuss the acceptor and rejector electronic circuits.

(a) Describe and explain the Miller indices. Recognize the symbols <111>, [010], (111). (b) Discuss the closest packed crystal structures.

(a) Can you imagine a three-dimensional diffraction grating? Describe in detail. (b) Justify the dual nature of light with elaborative examples.

(a) State and explain the three laws of Thermodynamics. (b) What is a heat engine? Determine the efficiency of the engine if it takes 10,000 J of heat and delivers 2000 J of work per cycle.

Write notes on any TWO: (i) Michelson-Morley experiment and its latest usage. (ii) Unification of forces and Abdus Salam's contribution. (iii) An essay on Large Hadron Particle Accelerator.