The bright yellow sodium line in the sodium spectrum is, Ask an Expert

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The bright yellow sodium line in the sodium spectrum is actually a pair of closely spaced lines at 589.0nm and 589.6 nm. You observe the sodium spectrum using a diffraction grating with a spacing of 1700 nm.

a) Find the angular separation between the two sodium lines in first order.

b) Find the angular separation between the two sodium lines in second order. Express your answers to two significant figures and include the appropriate units.

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