In the lab you have observed sodium D doublet lines from a sodium arc lamp. Choo

Question

In the lab you have observed sodium D doublet lines from a sodium arc lamp. Choose all that are correct about the sodium D doublet line observation from the following.

The sodium D lines are the strongest spectral lines among all the atoms at any wavelength.

The two spectral lines in the doublet corresponds to the Balmer series of the sodium atoms.

For a clearer observation of the doublet lines, it is better to have a wider collimator slit because the angular separation of the doublet becomes greater if more light comes through the collimator.

Sodium D lines are doublet lines (narrowly separated two lines) because of the intrinsic magnetic moment of the electron.

Peaks 2 and 3 correspond to the first order maxima of 589.3 nm line and peaks 1 and 4 to the second order maxima of 589.3nm line.

Peaks 1 and 2 correspond to the 1st order maxima of 589.3nm line and peaks 3 and 4 correspond to the 2nd order maxima of 589.3nm line.

Peaks 2 and 3 belong to the first order maxima of 589.0nm line and peaks 1 and 4 correspond to the first order maxima of 589.6nm line.

Peaks 1 and 4 belong to the first order maxima of 589.0nm line and peaks 2 and 3 correspond to the first order maxima of 589.6nm line.

Explanation / Answer

The correct statement is: Peaks 1 and 2 correspond to the 1st order maxima of 589.3nm line and peaks 3 and 4 correspond to the 2nd order maxima of 589.3nm line.

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