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Question 1State Einstein’s postulates of Special Theory of Relativity. Discuss its results.

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Question 2What are the main features of the thermal radiations from a black body? Discuss Planck’s quantum theory and its importance in Physics.

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Question 3What are the main features of photoelectric effect? Discuss the failure of classical Physics and success of photon concept in explaining the effect.
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Question 4What is Compton Effect? Develop a mathematical relation for the Compton shift.

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Question 5Write note on pair production and annihilation of matter.

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Question 6What is de’ Broglie’s hypothesis? Describe an experiment to show that particle has wave characteristics.
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Question 7What is meant by wave-particle duality? Explain.

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Question 8State and explain Hysenberg’s uncertainty principle. Justify the validity of this principle by a thought experiment.

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Numerical Problems included in the theory.

ProblemThe rest mass of an electron is 9.11 × 10-31 kg. Calculate the corresponding rest energy.
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ProblemA space ship is measured 100 m long while it is at rest with respect to an observer of this ship now flies by the observer with a speed of 0.99c. What length will the observer find for the spaceship?
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ProblemA traveler on a train with a speed of 0.8c, picks up and open a newspaper. The event takes 1.0 s as measured by the train traveler. What would be the time observed by the person standing by the side of the track?
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ProblemSuperman, who has an exceptionally strong arm, throws a fast ball with a speed of 0.9 c. If the rest mass of the ball is 0.5 kg, what is its mass in flight?
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ProblemThe temperature of the skin is approximately 35 deg C. What is the wavelength at which the peak occurs in the radiation emitted from the skin?
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