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Why do we see emission lines when electrons return to the ground state?
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Why do we see emission lines when electrons return to the ground state?

User Shone
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they emit light with a specific wavelength related to the energy difference between the two orbits.
User Lloydworth
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Emission lines are seen when electrons return to lower energy levels because they release energy in the form of photons with specific wavelengths corresponding to the energy difference between the levels.
User Rishabh Batra
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