10 what causes the dark bands observed in a solar spectrum Ideas

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Below is information and knowledge on the topic what causes the dark bands observed in a solar spectrum gather and compiled by the show.vn team. Along with other related topics like: the apparent shift in a star’s position caused by the motion of the observer is called ____., all stars, including the sun, have the following identical composition:, Absorption spectrum, what color does a star burn when it is at the beginning of its main sequence phase?, Visible light arranged according to wavelengths, Absorption spectrum of hydrogen, Fraunhofer lines in solar spectrum, Absorption spectrum vs emission spectrum.


Fraunhofer Lines? | Importance, Sun, Colors & Light

The Fraunhofer lines are any of the dark absorption lines in the spectrum of stars (like the Sun), which is caused by selective absorption of a star’s radiation at specific wavelengths by various gas elements existing in the atmosphere.

First observed by an English physicist William Hyde Wollaston in 1802 but are named after a German physicist Joseph von Fraunhofer. Since 1814 Fraunhofer plotted more than 500 Fraunhofer lines and assigned the brightest by letters A to G, which is still in use today.

At the time of writing this, there are 25,000 Fraunhofer lines which are known to exist in our Solar System spectrum.

There are three kinds of spectra you should know about.

Continuous – All the colours, i.e. wavelengths, of the visible spectrum with nothing missing. What we see when white light is dispersed by a prism.

continous spectrum
Image via: NASA

Emission – When atoms are excited they give off light. Different elements produce light with very definite wavelengths, i.e. very definite colours. Sodium lamps are yellow because sodium emits lots of yellow light. Neon lights are red because neon atoms emit lots of red and orange light. Mercury emits lots of blue and green light. Think of it as a fingerprint or a barcode. If we can measure the wavelength of the light given off by a substance, we can identify it. Here is the visible part of the emission spectrum for hydrogen.

spectrum emission
Image via: NASA

Absorption – If white light, containing all the colours, passes through a gas then when it emerges some of the colours are missing. This is because the atoms in the gas absorb light with very definite wavelengths, actually exactly the same wavelengths that the same atoms would emit if they were excited. What we see is a continuous spectrum with black lines on it. Here is an absorption spectrum for hydrogen. Notice what colours are missing.

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spectrum absorption
Image via: NASA

If we pass sunlight through a prism, we see the visible spectrum we expect but also many black lines. It is called the Fraunhofer spectrum after one of the first people to study it. Below is a German stamp featuring Fraunhofer’s original drawing.

This is, of course, an absorption spectrum. The black lines, over 600 of them, are due to the absorption of particular wavelengths of light by chemical elements in the outer layers of the Sun. This means that if we measure the wavelength of these black lines, we can identify what elements there actually are in the Sun. Their relative intensity also tells us how much of these elements are present and so we can build up a pretty good picture of what the Sun is made of.

One set of lines, including a strong yellow line, did not correspond to any known element. In 1870 Lockyer suggested that they corresponded to a new element which he named Helium after the Greek Sun god Helios. 25 years later Helium was discovered on Earth.

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What Are Fraunhofer Lines? | Importance, Sun, Colors & Light

What Are Fraunhofer Lines? | Importance, Sun, Colors & Light

  • Author: nineplanets.org

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  • Sumary: The Fraunhofer lines are any of the dark absorption lines in the spectrum of stars, which is caused by selective absorption of a star’s radiation.

  • Matching Result: The Fraunhofer lines are any of the dark absorption lines in the spectrum of stars, which is caused by selective absorption of a star’s radiation.

  • Intro: What Are Fraunhofer Lines? | Importance, Sun, Colors & Light The Fraunhofer lines are any of the dark absorption lines in the spectrum of stars (like the Sun), which is caused by selective absorption of a star’s radiation at specific wavelengths by various gas elements existing in the atmosphere. First…
  • Source: https://nineplanets.org/questions/what-are-fraunhofer-lines/

Absorption/emission lines – Khan Academy

Absorption/emission lines - Khan Academy

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  • Sumary: Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

  • Matching Result: When light passes through gas in the atmosphere some of the light at particular wavelengths is scattered resulting in darker bands. These lines came to be known …

  • Intro: Absorption spectrum (emission spectrum lines) (article) | Khan Academy If you’re seeing this message, it means we’re having trouble loading external resources on our website. If you’re behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
  • Source: https://www.khanacademy.org/science/class-11-chemistry-india/xfbb6cb8fc2bd00c8:in-in-structure-of-atom/xfbb6cb8fc2bd00c8:in-in-bohr-s-model-of-hydrogen-atom/a/absorptionemission-lines

What Causes The Dark Bands Observed In A Solar Spectrum

What Causes The Dark Bands Observed In A Solar Spectrum

  • Author: microblife.in

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  • Sumary: It was correctly deduced that dark lines in the solar spectrum are caused by absorption by chemical elements in the solar atmosphere. Some of the observed features were identified as telluric lines originating from absorption by oxygen molecules in the Earth’s atmosphere.

  • Matching Result: Fraunhofer lines in astronomical spectroscopy any of the dark (absorption) lines in the spectrum of the Sun or other star caused by selective …

  • Intro: What Causes The Dark Bands Observed In A Solar Spectrum – Micro B LifeIt was correctly deduced that dark lines in the solar spectrum are caused by absorption by chemical elements in the solar atmosphere. Some of the observed features were identified as telluric lines originating from absorption by oxygen…
  • Source: https://www.microblife.in/what-causes-the-dark-bands-observed-in-a-solar-spectrum/

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Sunspots: What are they, and why do they occur? – Space.com

Sunspots: What are they, and why do they occur? - Space.com

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  • Sumary: Sunspots are our windows into the sun’s complex interior.

  • Matching Result: As the sun rotates, these magnetic loop “rubber bands” get more wound up (both tighter and more complicated). Eventually, the magnetic fields ” …

  • Intro: Sunspots: What are they, and why do they occur? Home References Science & Astronomy Sunspots are cooler regions on the surface of the sun that can spawn eruptive disturbances, such as solar flares and coronal mass ejections. (Image credit: NASA/SDO) Sunspots are dark, planet-size regions of strong magnetic fields on…
  • Source: https://www.space.com/sunspots-formation-discovery-observations

Fraunhofer lines | physics | Britannica

Fraunhofer lines | physics | Britannica

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  • Sumary: Fraunhofer lines, in astronomical spectroscopy, any of the dark (absorption) lines in the spectrum of the Sun or other star, caused by selective absorption of the Sun’s or star’s radiation at specific wavelengths by the…

  • Matching Result: Fraunhofer lines, in astronomical spectroscopy, any of the dark (absorption) lines in the spectrum of the Sun or other star, caused by selective absorption …

  • Intro: Fraunhofer lines | physics Entertainment & Pop Culture Geography & Travel Health & Medicine Lifestyles & Social Issues Literature Philosophy & Religion Politics, Law & Government Science Sports & Recreation Technology Visual Arts World History On This Day in History Quizzes Podcasts Dictionary Biographies Summaries Top Questions Week In Review…
  • Source: https://www.britannica.com/science/Fraunhofer-lines

Frequently Asked Questions About what causes the dark bands observed in a solar spectrum

If you have questions that need to be answered about the topic what causes the dark bands observed in a solar spectrum, then this section may help you solve it.

What exactly is an apparent position change brought on by the movement of the observer?

Simply put, parallax is the apparent shift of an object against a background brought on by a change in observer position. More precisely, motion parallax is the change of angular position of two stationary points relative to each other as seen by an observer, caused by the motion of an observer.

What causes the star’s position to change the most?

The stars rotate around the north and south celestial poles; therefore, the stars are always moving relative to a point on the earth’s surface. The monthly positions of the stars change as a result of the interaction between the rotation of the earth around its axis and the orbit of the earth around the sun.

Which planet most closely resembles the Sun in terms of composition and density?

Jupiter and Saturn, the two largest planets, share nearly the same chemical composition as the Sun; they are primarily made up of the two elements hydrogen and helium, accounting for 75% of their mass and 25% of their volume, respectively.

How long does the solar activity cycle last when the polarity of the Sun’s magnetic field is considered?

The Short Answer: The Sun’s magnetic field undergoes a cycle known as the solar cycle, which lasts approximately b>11 years/b>. During this time, the Sun’s north and south poles alternate positions, and it takes another 11 years for this to happen again.

What impact does an apparent wavelength shift have?

Named after Austrian physicist Christian Doppler, who first described the phenomenon in 1842, the Doppler effect, also known as the Doppler shift or simply Doppler, is the change in frequency of a wave in relation to an observer moving in relation to the wave source.

What causes the sun’s apparent positional changes?

The Earth rotates, and as it moves eastward on its axis, we move with it, giving the appearance that the Sun moves across the sky throughout the course of a day.

What are the three elements that influence the brightness of the star?

The size, temperature, and distance of a star are the three variables that determine how bright it appears to us on Earth.

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From this vantage point, what could explain why the star appeared to be moving across the night?

The Sun, Moon, and planets appear to move across the sky much like the stars, rising in the East, passing overhead, and setting in the West. This motion is caused by the Earth’s rotation. As the spin of the Earth carries us eastward at nearly one thousand miles per hour.

Why is it that Jupiter is not a star?

“Jupiter is called a failed star because it is made of the same elements (hydrogen and helium) as is the Sun, but it is not massive enough to have the internal pressure and temperature necessary to cause hydrogen to fuse to helium, the energy source that powers the sun and most other stars.

Which planet carries the moniker “Morning Star”?

Mercury is one of the five planets known to the ancients. They called these planets “wandering stars.” Mercury may be seen as an evening “star” near where the sun has set, or as a morning “star” near where the sun will rise.

How do we know that the sunspots have a powerful magnetic field?

Because of a phenomenon known as the Zeeman effect, which shows us how the field affects the spectral lines we see, we can directly observe the magnetic properties of sunspots.

What occurs when the Sun’s polarity is reversed?

For example, the polarity reversal will cause the “current sheet” ? an enormous surface extending out from the solar equator on which the sun’s rotating magnetic field has induced an electric current ? to become much wavier.

What is thought to be the cause of the cool and dark nature of sunspots?

Because they develop in regions with particularly potent magnetic fields, sunspots are relatively cool because they prevent some of the Sun’s internal heat from reaching the surface.

What messes up the magnetic field of the Sun?

Since the Sun’s gaseous sphere rotates more quickly at its equator than at its poles, the overall magnetic field of the Sun over time becomes distorted and twisted, which scientists believe is the underlying cause of the magnetic ropes on the Sun.

When did the sun last change polarity?

Scientists think the north pole completed the change from positive to negative polarity in June 2012, and the south pole completed the change from negative to positive polarity in July 2013.

The sun rotates its axis every 11 years; why?

The sun’s magnetic field changes polarity approximately every 11 years. It happens at the peak of each solar cycle as the sun’s inner magnetic dynamo re-organizes itself. The coming reversal will mark the midpoint of Solar Cycle 24. Half of “solar max” will be behind us, with half yet to come.

The Earth has never rotated around its axis.

The magnetic field significantly weakened and the poles reversed during the last major excursion, known as the Laschamps event, about 41,500 years ago, according to radiocarbon evidence. The poles then flipped back about 500 years later.

How long will the Sun be around?

Don’t worry, though; our Sun still has about 5,000,000,000 or five billion years left in it.

Why are there six months of darkness at the poles?

Because the Earth’s axis is tilted away from the perpendicular to Earth’s orbital plane, very little sunlight is allowed to reach the north and south poles, resulting in approximately six months of daylight followed by approximately six months of darkness at the poles.

Why is there darkness for six months at the South Pole?

The seasons are caused by the tilt of the Earth’s axis in relation to the sun, which never changes in direction, but as the Earth orbits the sun, different parts of the planet are exposed to direct sunlight. Antarctica has six months of daylight in its summer and six months of darkness in its winter.

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