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Q: Why is the spectra from stars crossed with dark lines?
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What does a stars dark line spectrum reveal?

The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.


What does a star's dark-line spectrum reveal?

The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.


How can you Distinguish absorption spectrum from emission spectrum?

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.


Why do scientist believe that dark matter does not interact through the electromagnetic force?

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.


Stars produce different spectra mainly because?

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".


Can the pattern of dark lines recorded by a spectrograph be used to identify the elements that are in the stars atmosphere?

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.


When was The Dark Beyond the Stars created?

The Dark Beyond the Stars was created in 1991.


Why can you see the stars when it is dark?

The sky is brighter than the stars before it is dark.


The dark lines in the spectrum were named for who EXACTLY?

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.


What are dark lines in a stellar spectrum called?

The dark lines are absorption spectrum, the energy absorbed by Atoms in the atmosphere of the star. ================================ Fraunhofer's spectral lines.


Is this a metaphor her dark eyes made a little reflected stars?

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.


How many pages does The Dark Beyond the Stars have?

The Dark Beyond the Stars has 408 pages.