## • Foundational problems in theoretical physics

The incompatibility between local quantum field theory and general relativity is one of the main open problems in theoretical physics. String theory is an attempt at its resolution. While it was originally formulated as a theory of the strong interactions - a method in the madness of the proliferation of observed hadronic resonances - it was soon realized that the theory always contains a massless spin two excitation which can be interpreted as the quantum of the gravitational interaction, the graviton.

For the past three days a group of theoretical physicists has been meeting at the George Washington University and the Carnegie Institution of Washington for the purpose of discussing the general subject of gravitation and electro-magnetism in relation to the general theory of relativity. This Conference is the tenth of a series which started in 1934 and which have been held annually except for the war years. The discussions this year were in line with the general purpose of the Conference, which is to promote thinking on and discussion of unsolved problems in theoretical physics.

## Five Great Problems in Theoretical Physics

If you’ve ever had the opportunity to read by , she writes at great length about this puzzle, which I would call the greatest unsolved problem in theoretical physics: .

Students who concentrate in physics develop the ability to solve problems by working with their smaller components. They learn to summarize what is known about physics problems through research, acquire shop and technical laboratory skills necessary to answer questions experimentally, and learn mathematical and computer methods to solve problems in theoretical physics. The following list presents some examples of the abilities associated with physics majors.“It’s possible for particular cases of a problem to be solvable even when the general problem is undecidable, so someone may yet win the coveted $1 million prize," . "But our results do raise the prospect that some of these big open problems in theoretical physics could be provably unsolvable."