Answer the following problems

problem 1) What are different interactions that exist among the elementary particle.

problem 2) Describe charge conjugation and space inversion invariance.

problem 3) What are block equations?

problem 4) Obtain solutions for Block equations for steady state conditions.

problem 5) Derive the expression for the separation between consecutive rotational lines in non-rigid rotator approximation.

problem 6) prepare down the applications of rotational spectroscopy.

problem 7) Describe energy levels, selection rules treating vibrating diatomic molecule as a harmonic oscillator.

problem 8) What happens to rotational constant of V=1 state in comparison to V=0 state of vibration rotation interaction takes place?

problem 9) prepare notes on the following :

(a) Meson theory of nuclear forces.

(b) Semi-empirical mass formula.

(c) Conservations laws among elementary particles.

(d) PQR branches in IR spectrum

problem 10) What is co-ordination number? Find out the number of nearest neighbours and the nearest neighbour distance for monoatomic sc, bcc and fcc structures. Demonstrate that the atomic packing factors for fcc and hop metals are same.