PTU Important Questions----Theory Of Relativity

       Physics:

Important Questions related to chapter --Theory Of Relativity.

 2-marks/4-marks

Q1. Define frame of reference.
Q2. Explain the term time dilation.
Q3. Explain the concept of Ether.
Q4. Is earth an inertial frame? Explain briefly.
Q5. State the postulates of special theory of relativity.
Q6. Explain why a particle cannot move faster than velocity of light.
Q7. Define (a) Proper Length   (b) Proper Time
Q8. Show that relativistic law of addition of velocities predicts value of velocity
       of light in all inertial frames.
Q9. Prove that rest mass of photon is zero.
Q10. Photon has zero rest mass but has momentum. Explain.
Q11. Explain the term length contraction.
Q12. Prove that velocity of light is independent from the velocity of frame of reference.
Q13. What are the outcomes of Michelson-Morley experiment?
Q14. Find the velocity at which mass of a particle is double its rest mass.
Q15. Calculate the velocity of 1 Mev electron.
Q16. Why a moving rod appears shorter than its actual length?



6-marks/8-marks

Q1. (a)  Explain Michelson Morley experiment and discuss its significance.
       (b)  Explain various postulates of Special theory of Relativity.

Q2. (a) Explain the postulates of theory of relativity
       (b) Derive Lorentz's transformation equations.
      
Q3. Show that the mass of the body in motion is given by
                                                  
        where m0 is the rest mass and v is the velocity of the body.
Q4. (a) Prove that E= mc^2 . State its applications.
       (b) Show that no particle can have velocity greater than that of light.

Q5. (a) Derive the relation between relativistic energy and momentum.
       (b) Prove that momentum of a particle having rest mass and kinetic energy 'T' is equal to