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Match the letter located in the digital spectra above (in the second picture) with the correct statement about each spectrum. 1) Lines of neutral helium. Hydrogen lines moderately strong 2) Hydrogen lines very strong and dominate the spectrum. 3) Lines of ionized helium; most lines are weak because the star is so hot most electrons are removed from atoms and there are few atoms making transitions. 4) Lines of neutral elements strongest. Singly ionized calcium lines are weaker, but still present. 5) Lines of easily ionized elements like singly ionized calcium are strong; hydrogen lines are weak because it is not hot enough for hydrogen to be in the n=2 state. 6) Singly ionized Calcium (393.0 nm) and a hydrogen line (434.0 nm) are about equal strength. 7) Many lines of neutral elements and molecular states.

Match the letter located in the digital spectra above (in the second picture) with the correct statement about each spectrum. 1) Lines of neutral helium. Hydrogen lines moderately strong 2) Hydrogen lines very strong and dominate the spectrum. 3) Lines of ionized helium; most lines are weak because the star is so hot most electrons are removed from atoms and there are few atoms making transitions. 4) Lines of neutral elements strongest. Singly ionized calcium lines are weaker, but still present. 5) Lines of easily ionized elements like singly ionized calcium are strong; hydrogen lines are weak because it is not hot enough for hydrogen to be in the n=2 state. 6) Singly ionized Calcium (393.0 nm) and a hydrogen line (434.0 nm) are about equal strength. 7) Many lines of neutral elements and molecular states.

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Match the letter located in the digital spectra above (in the second picture) with the correct statement about each spectrum.

1) Lines of neutral helium. Hydrogen lines moderately strong
2) Hydrogen lines very strong and dominate the spectrum.
3) Lines of ionized helium; most lines are weak because the star is so hot most electrons are removed from atoms and there are few atoms making transitions.
4) Lines of neutral elements strongest. Singly ionized calcium lines are weaker, but still present.
5) Lines of easily ionized elements like singly ionized calcium are strong; hydrogen lines are weak because it is not hot enough for hydrogen to be in the n=2 state.
6) Singly ionized Calcium (393.0 nm) and a hydrogen line (434.0 nm) are about equal strength.
7) Many lines of neutral elements and molecular states.

F 390 400 410 420 430 440 450 390 400 410 420 430 440 450 A 390 00 410 420 430 440 450 D 390 400 410 420 430 440 450 E 390 400 410 420 430 440 450 G 390 400 410 420 430 440 450 w my mamm 390 400 410 420 430 440 450
Transcribed Image Text:F 390 400 410 420 430 440 450 390 400 410 420 430 440 450 A 390 00 410 420 430 440 450 D 390 400 410 420 430 440 450 E 390 400 410 420 430 440 450 G 390 400 410 420 430 440 450 w my mamm 390 400 410 420 430 440 450
The picture shows seven stellar absorption spectra with type O at the top, B next, and so on down to M at the bottom. Only the blue part of the spectrum is shown. The strength of the line is determined by how dark the line is. In the next problem is shown a digital version of the same spectra in randomized order. The intensity is the vertical axis. In both pictures, the horizontal axis is wavelength. (2) (3) (4) (0) (7)
Transcribed Image Text:The picture shows seven stellar absorption spectra with type O at the top, B next, and so on down to M at the bottom. Only the blue part of the spectrum is shown. The strength of the line is determined by how dark the line is. In the next problem is shown a digital version of the same spectra in randomized order. The intensity is the vertical axis. In both pictures, the horizontal axis is wavelength. (2) (3) (4) (0) (7)
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