spectrographic

/ˌspɛktrəˈɡræfɪk/
adjective
  1. Relating to or produced by a spectrograph, an instrument that records or analyzes spectra (patterns of light or other radiation).
    • A spectrographic image of the sample revealed several unknown elements.
    • The museum displayed a spectrographic analysis of the ancient pigment to determine its origin.
    • The scientists used spectrographic methods to identify the chemical composition of the star.