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# What is the wavelength of light emitted when the electron in a hydrogen atom undergoes a...

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 9 to level n = 4? (c = 3.00 × 108 m/s, h = 6.63 × 10-34 J • s), RH = 2.179 × 10-18 J) a) 5.49 × 105 m b) 1.09 × 10–19 m c) 1.65 × 1014 m d) 3.64 × 10–28 m e) 1.82 × 10–6 m

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