why does helium have more spectral lines than hydrogen
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Stars of spectral class M do not show strong lines of hydrogen in their spectra because
Stars of spectral class m do not show strong lines of hydrogen in their spectra because
The three principal visible spectral lines from hydrogen havewavelengths 434 nm, 486nm, and 656nm. The principal line of sodiumis at 589 nm. A sodium lamp used to calibrate a diffraction gratingshows the first-order sodium line at 24.3^\circ from the centralmaximum.A)Find the angular position of the first spectral line in hydrogen434 nm.B)Find the angular position of the second spectral line in hydrogen(486 {\rm nm}).Express your answer with the appropriate units.C)Find the angular position of the third spectral line in hydrogen(656 {\rm nm}).Express your answer with the appropriate units.