WHAT IS PHYSICS ? AND WHY IT IS VERY IMPORTANT FOR ENGINEERS AND SCIENTIST ?

there is a question in i think every engineers mind that why physics is so much important to learn, so here is the answer for that. 

What Is Physics?

The domain of  physics is the physical universe

The domain of  physics extends from the smallest subatomic particles to the universe as a whole. Physics does not seek to answer questions of  religion, literature,  or  social  organization.  While  physics  is  creative, and we may refer to the art of  physics  and recognize artistic beauty in conceptual frameworks, there is a fundamental difference between art and physics. Art can be created in any form envisioned by the artist, but physics must comply with the nature of  the physical universe. Nor is mathematics or philosophy the same as physics.

Physics  is  a quantitative discipline

Most  physicists  spend  more  time  performing computations than they spend on any other single aspect of  physics. Although all sciences and engineering are increasingly mathematically sophisticated, most would agree that physics is the most mathematical of  the sciences.

Physics uses equations extensively to express ideas

You should view physics equations as a shorthand notation for the theories and relationships they represent. While we can express physics concepts in words, it is more efficient, particularly in situations simultaneously involving a number of  different physics ideas, to use equation notation.

Applying physics, though, is not simply selecting from a large pool of established equations. You should always ask yourself  whether a relationship is applicable to the situation, and what assumptions are inherent in using any particular equation. It is a good idea to start every problem by considering the physics concepts that may be helpful, rather than starting with equations. Although equations form the language of  physics, the heart  of  physics  is  made  up  of  the  physical  concepts the equations represent. An analogy might be you and your name; it is efpficient for others to refer to you by your name, but the important thing is who you are, not your name.

Physics involves  many  skills

Through the study of physics you can learn  critical  thinking,  computational, and analytical skills that can be applied beyond the sciences and engineering.  You will use leading-edge technologies such as 3-D models and printing, digital signal analysis, automated control systems, digital image analysis, visualization, symbolic algebra,  and  powerful computational software in physics, learning techniques that have broad application. For example, a number of physicists find employment developing economic and investment  models  for financial institutions,  while others find positions in computing and technological  fields, including game development, media special effects, quality control, and advanced manufacturing support.

Models, predictions, and validation 

Physicists develop hypotheses and models based on patterns recognized in observations and experiments. From these hypotheses and models they develop predictions that can be tested with further measurements. If  the additional  measurements are not  consistent  with the predictions, our model must be wrong, or at least inadequate. It is important to realize that “proof”  in physics  is  never  absolute.  We  can  prove  that  a  model or hypothesis is wrong through predictions and experiments, but we cannot prove it is absolutely right. We do develop confidence in models that have been used for many predictions, all of which have been found consistent with experiment, but that is not the same as saying we are sure the model will hold up in all possible future experiments and situations.

Physics seeks explanations with the greatest simplicity and widest realm of application

Those from outside physics often view physics, incorrectly, as a collection of a large number of laws. Rather, physics seeks to explain the physical universe and all that it contains using a limited number of relationships. For example, we only need to invoke four types of interactions to explain all forces in physics: gravitation, electromagnetism, weak nuclear forces, and strong nuclear forces. Many physicists believe that ultimately these can be brought together as different aspects of a single unified theory.

Physicists need to be creative 

Physicists design experiments, find applications for physical principles, and develop new models and theories. Some philosophers of science have asked whether the electron was invented or discovered. Such questioning stresses that, while there is a part of physics that is independent of the observer, the specific models we develop to help understand nature critically depend on the creativity and imagination of physicists. It is not surprising that many physicists are also interested in other creative pursuits, such as music and art. 

Physics is a highly collaborative discipline 

Most physicists routinely work with colleagues from other countries, often using international research facilities. Pick up a physics research journal and you will see that the majority of papers are written by collaborations of scientists from different institutions and countries. For example, the ATLAS (A Toroidal LHC Apparatus) LHC (Large Hadron Collider) experiment is a collaboration of more than 3000 researchers from more than 40 different countries. The LIGO (Laser Interferometer Gravitational-Wave Observatory) scientific collaboration includes more than 1000 scientists.  Because of its collaborative nature, interpersonal and leadership skills are critical for success in physics. 

Physics is both deeply theoretical and highly applied

Some physicists work exclusively in fundamental areas that have no immediate application, whereas others concentrate on solving applied problems. Very often work initially deemed to have little practical use turns out to have important applications. For example, in 1915, Albert Einstein published a new theory of gravitation called general relativity. When general relativity was developed, it had no foreseeable practical applications. Today, however, the Global Positioning System (GPS) would be hopelessly inaccurate without corrections for the gravitational effects predicted by general relativity theory.

Successful physicists are good communicators 

Whether writing experiment reports, scientific papers, or grant applications, or communicating with classes or the general public,  scientists  must have effective  and flexible communication skills.