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Q.

In the spectrum of sodium, the wave lengths of two bright lines are

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a

5980 A°, 5896A°

b

5890 A°,5869 A°

c

5890 A°, 5896 A°

d

5908 A°, 56689 A°

answer is C.

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Detailed Solution

The sodium spectrum is dominated by the bright doublet known as the Sodium D-lines at 5890 A°, 5896 A°.

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