We all have many questions in our mind regarding physics during our learning of this subject and the most common question is, What physics exactly is? We all read books and listen to lectures on topics related to physics but our books mostly tell us about that particular topic on which they are written. There are very few books and authors who tell us what physics exactly is and what people are doing who claim themselves to be a physicist. Now I will try to share my understanding and views on what physics exactly is? In a very simple language, physics is one of the branches of natural science which deals with the physical properties of the stuff there in the universe. Now the question is what is other than physical in the universe and the answer is that we don't know exactly, but we believe that everything out there is physical and we somehow will be able to detect it (there is a subject called philosophy which assumes that there is something beyond physical). Other than that, we don't know exactly why and how but, there is another phenomenon called life, to which we humans consider separately. But at the very fundamental level, this phenomenon also seems to be physical. So very safely we can say that physics is the study of almost everything out there in the universe.
Now before going further, let me tell you what methods these particular humans called physicists use to know more about the universe, and it's not any magical method but, it's just very straightforward that the idea or the information they have about the stuff in the universe must be experimentally verified. Now the question is how they generate the ideas or information which they verify through experiments? That's the job of a physicist. They do observations, experiments, and a lot of guessing based on the previous information they have.
So doing physics is doing experiments, observations, and guessing based on the previous data and information.
Written by Vikrant Kumar.
Note: I will edit it in the future to complete it so till then think about what I have written and enjoy.