Question

Explain two principle thrusts in physics-unification and reduction.

Answer 1

act if unifying the diff. laws valid for diff phenomena into a single theory that explains all the different phenomena.
breaking down of complex system into simple constituent system.

Answer 2

Answer:

Two main thrusts in Physics are :

(i) Unification is explaining diverse physical phenomena in terms of a few concepts and laws, e.g., same l aw of gravitation given by Newton explains planetary motion, motion of moons around a planet and a body  falling to the ground.

(ii) Reduction is deriving the properties of bigger, more complex system from the properties and interaction  of its constituent simpler parts, e.g., in thermodynamics, the temperature is related to the average kinetic  energy of molecules of the system.