64. Electromagnetic radiation provides a means to probe aspects of the physical universe. Which of the following statements regarding radiation spectra is NOT correct? a. lines in the infaret, visible, and ultraviolet regions of the spectrum reveal primarily the nuclear structure of the sample. b. the wavelengths identified in an absorption spectrum of an element are among those in its emission spectrum. c. absorption spectra can be used to determine which elements are present in distant stars. d. spectral analysis can be used to identify the composition of galactic dust. e. band spectra are due to molecules. The answer is a. This makes sense to me, but I'm not sure exactly why it must be the correct answer, and the others answers are false. Can someone explain each one in some detail? Thanks!!