The emission spectrum of gold shows a line of wavelength 2.676 x 10-7 m. How much energy is emitted as the excited electron falls to the lower energy level? Select one: O a. 5.16 x 10-20 J O b. 5.90 x 10-20 J O c. 7.43 x 10-19 J O d. 6.05 x 10-19 J