JEE Main & Advanced
Physics
Nuclear Physics And Radioactivity
Question Bank
Mock Test - Modern Physics
question_answer
A sodium atom is in one of the states labelled 'Lowest excited levels'. It remains in that state for an average time of \[{{10}^{-8}}\] sec, before it makes a transition back to a ground state. The uncertainty in energy of that excited state is \[M\times {{10}^{-8}}\]eV. Find the value of M