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Question: The allowed energies of a quantum system are 1.0 eV, 2.0 eV, 4.0 eV, and 7.0 eV. What wavelengths appear in the system's emission spectrum? Express your answer using two significant figures. Enter your answers in ascending order separated by commas. The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.

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