Name the electromagnetic waves that have frequencies greater than those of ultraviolet light but less than those of gamma rays.
Answers
The Standard Model of particle interactions is a theory developed from 1970 to 1973 which explains everything that is currently known about particle physics. It includes the electroweak theory, quantum chromodynamics, and special relativity. The only thing left out of the model is gravity. It is a hugely successful theory in that all its predictions have been experimentally verified to amazing accuracy. Nevertheless, most physicists are not happy with it for several reasons, including its 19 free parameters (physical constants whose values need to be put in by hand), its lack of elegance and simplicity, and the absence of gravity. The consensus is that there's a bigger theory which includes gravity and with no free parameters. This would be a unified field theory, or a theory of everything. Although physicists since Einstein in the 1920s have been searching for a unified field theory, they have not succeeded yet, though there is some hope that they will soon.