The wavelength of the first spectral line of sodium is \( 5896 \AA \). The first excitation pote.... VIDEO
The wavelength of the first spectral line of sodium is \( 5896 \AA \). The first excitation potential of sodium
\( \mathrm{P} \)
atom will be \( \left(h=6.63 \times 10^{-34} J s\right) \)
(1) \( 4.2 \mathrm{~V} \)
(2) \( 3.5 \mathrm{~V} \)
(3) \( 2.1 \mathrm{~V} \)
(4) None of these
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