Q33. The separation between the energy levels of a tw0-level atom is2 eV. Suppose that 4x10 atoms are in the ground state and 7x10 atoms are pumped into the excited state just before lasing starts. How much energy will be released in a single laser pulse? (a) 24.6 J (b) 22.4J (c)98 J (d) 48J
it's not always that N2 - N1 will come to ground . since saperation energy is given and we know no of particle with respect to energy levals. so the most efficient way to find the ...