1. (a) An atom initially in an energy level with E=−6.52 eV absorbs a photon that has wavelength 860 nm . What is the internal energy of the atom after it absorbs the photon?
2. (b) An atom initially in an energy level with E=−2.68 eV emits a photon that has wavelength 420 nm . What is the internal energy of the atom after it emits the photon?