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Calculate the Rydberg constant RH if He...

Calculate the Rydberg constant ` R_H` if `He^+` ions are known to have the wavelength difference between the from ( of the longest wavength ) lines fo Balmer and Lyman series equal to ` 133.7 nm`.

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The correct Answer is:
`=1.096x10^(7)m^(-1)`
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