Physics: wonders of nature

 Physics is a branch of science in which we study the physical behaviour(phenomena) of nature.

What is interesting about physics is its wonders which surprise us. If you look at bicycle ,car and big machinery, there is always a question how these things work and the answer is physics. all is possible due to physics .

Basically physics is answer of the all those questions(associated with physical nature) which arises from human mind. Let's take an example of electricity, we know how useful this is in this world, so my question is how this work? When I was a child I always enthusiastic about this question that how can a small battery glow the bulb so I opened  up the battery and see where this light is stored and I get nothing except some chemical and metal pieces. At that time I got upset but when was in 8th standard I understand there is lot of physical process happening there. If I ask you how many physical process involve in the process of glowing a bulb from battery?The answer is many processes. The first process is ,there is chemical reaction going on in the battery. Second ,production of electrons and metal ions from this chemical reactions. Third is flow of current through conducting wire to bulb. And the fourth is, resistance of current in bulb which lead to glow the bulb. There are many small processes involves in each process we explained. So to understand the physics we have to break the phenomenon in smaller phenomena and again break to super smaller and again and again we do the same thing ,when we reach a level where things getting complicated and error is less than we should stop and we get a concept of physics.