Back Spektraallyn Afrikaans خط طيفي Arabic Спектрална линия Bulgarian བསྡུ་ཐིག Tibetan Línia espectral Catalan Spektrální čára Czech Спектр йĕрĕ CV Spektrallinie German Spectral line English Spektra linio Esperanto
A spectral line is the way scientists can tell one element from another by looking at color.