what are the uses of nuclear energy in day to day life and in the medical field?

Answer 1

Majority of the energy sources on the earth are originally from the Sun. The Sun passes its energy to the earth through radiation. How can the energy come from the Sun almost endlessly? Its nuclear (fussion) energy. No one can be alive without this nuclear energy,
In the medical field, nuclear radiation has been used for diagonoses as well as cancer treatment.