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The wavelength of the first spectral line of an element is 5893 Å. The first excitation energy is : |
2.1 eV 4.2 eV 6.3 eV 8.4 eV |
2.1 eV |
First Excitation energy is $ \Delta E = \frac{hc}{\lambda} = \frac{12400}{5893}eV = 2.10 eV$ |
