Question: the set of frequencies produced by an excited state atom is called its
[{'answer': 'emission spectrum', 'provenance': [{'wikipedia_id': '292420', 'title': 'Emission spectrum', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '292420', 'title': 'Emission spectrum', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 787, 'bleu_score': 0.983672097934538, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6576437742189148078}, 'section': 'Section::::Abstract.'}]}]