Show that a small change in the reduced mass of the electron produces a small change in a spectral line given by Use this to calculate the difference in the Balmer red line 656 3 nm between hydrogen and deuterium, which has a nucleus with twice the mass of hydrogen

Question: Show that a small change in the reduced mass of the electron produces a small change in a spectral line given by / = /.

Show that a small change in the reduced mass of the electron produces a small change in a spectral line given by Δλ/λ = Δμ/μ. Use this to calculate the difference Δλ in the Balmer red line λ = 656.3 nm between hydrogen and deuterium, which has a nucleus with twice the mass of hydrogen.

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