What Physicists do?
Physicists hold positions in areas of education, government, industries, private businesses and in interdisciplinary fields. It is difficult to find an area of modern life that is not affected by physics. The knowledge obtained from the study of physics is important in many other areas which include astronomy, biology, chemistry, geology, oceanography, engineering and patent law.
Some physicists are called experimental physicists. They perform carefully designed experiments and compare their results to available theories which are tested and modified to interpret and explains these results. Other physicists who are more interested in the mathematical aspects of physics - theoretical physicists - are involved in the development of laws and theories which are mainly expressed in the language of mathematics. Theoretical physicists may never actually have to make measuremants themselves but obtain the data from other people.
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CANADIAN ASSOCIATION OF PHYSICISTS (CAP)