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The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.
The sky is brighter than the stars before it is dark.
Atoms in the atmosphere of the star is responsible for the dark lines in its spectrum.
Dark-line spectrum is a "photo-negative" of emission spectrum. It is the gaps that appear in precisely the same location as corresponding bright lines. produced by a cool gas with a hot solid and you
absorption lines! :)
The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.
The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.
Emission spectra are bright-line spectra, absorption spectra are dark-line spectra. That is: an emission spectrum is a series of bright lines on a dark background. An absorption spectrum is a series of dark lines on a normal spectrum (rainbow) background.
Here is the simple simple answer. If dark matter did interact via the electromagnetic force, it would EMIT some light since light is the tell-tale evidence of electromagnetic interaction. This is known to not be the case. Also, and perhaps more importantly, if dark matter did interact electromagnetically it would ABSORB light from distant stars. This is known to not be the case since we don't see unexpected absorption lines in the spectra from stars in our galaxy or other galaxies.
The cavity radiation spectrum comes from surface temperature. Bright line (emission) spectra come from hot elements near the surface. Dark line (absorption) spectra come from cooler elements further out. Because they're at different temperatures and have slightly different elemental ratios, each star produces a unique "fingerprint".
Yes. Dark lines are absorption lines, they are due to relatively cool matter (such as that which might be found in a star's atmosphere as opposed to being in the body of the star itself), and each element has a characteristic pattern.
The Dark Beyond the Stars was created in 1991.
The sky is brighter than the stars before it is dark.
Joseph Von Fraunhofer as a German physicist who independently discovered (or rediscovered) dark "lines" in the emission spectra of the light emitted by the Sun. Fraunhofer carefully cataloged the precise frequencies of the light that was NOT being emitted by the Sun. Many years later, two other scientists realized that these colors of light were associated with the spectra of particular elements present in the Sun.
The dark lines are absorption spectrum, the energy absorbed by Atoms in the atmosphere of the star. ================================ Fraunhofer's spectral lines.
In a phrase which is not grammatically correct such as the above, it's kind of difficult to tell.If the meaning you were going for is along the lines of "her dark eyes reflected the stars" it's not a metaphor.If the meaning you were going for is more like "the light reflected from her dark eyes like stars" that's also not a metaphor, it's a very similar concept called a simile.If you were going for something like "The reflections from her dark eyes were stars in the night", then yes, that's a metaphor.
The Dark Beyond the Stars has 408 pages.