Medical physics is an applied area of physics.
In some cases radiation reduces the incidence of cancer.
Nuclear physics is interesting but it is unlikely to help society.
It is likely that we need more radiation to improve our longevity.
I have the satisfaction of knowing I did something useful for society.
I am now almost certain that we need more radiation for better health.
I am sure that I have been much more useful to society as a medical physicist.
I have devoted much time and energy to helping medical physics in developing countries.
I am not unhappy that my contribution was not recognized. I am sure it helped my career.
My main frustration is the fear of cancer from low dose radiation, even by radiologists.