F 400 430 440 410 420 B 390 400 410 420 430 440 A 400 410 430 440 D 390 400 410 420 430 440 390 400 410 420 430 440 G 390 400 410 420 430 440

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    Order the digital spectra above (shown in the second picture) from hottest to coldest. (Answer ABCDEFG, or DCBFGEA, or whatever is the correct order for your picture.)

 

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)
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
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