Absorption and Emission Spectra - OR

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What is an absorption spectrum?

Back

An absorption spectrum is a spectrum that shows the wavelengths of light absorbed by a substance, typically seen as dark lines or bands superimposed on a continuous spectrum of light.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Front

What is an emission spectrum?

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An emission spectrum is a spectrum of the electromagnetic radiation emitted by a source, showing bright lines or bands at specific wavelengths corresponding to the energy levels of the atoms or molecules.

Tags

NGSS.HS-PS4-3

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How can astronomers identify elements in a star's atmosphere?

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Astronomers can identify elements in a star's atmosphere by comparing the star's emission or absorption lines with known spectra of pure elements.

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What does it mean if a star's surface temperature is higher than that of the Sun?

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If a star's surface temperature is higher than that of the Sun, it typically indicates that the star is more luminous and may be in a different stage of its life cycle compared to the Sun.

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What class of stars has the lowest temperature?

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Class M stars have the lowest temperatures among the spectral classes of stars.

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What role does a cloud of dust and gas play in the observation of a star's light?

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A cloud of dust and gas can absorb certain wavelengths of light emitted by a star, resulting in an absorption spectrum that shows which elements are present in the cloud.

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-4

Front

What is the significance of emission lines in a spectrum?

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Emission lines in a spectrum indicate the presence of specific elements in a gas, as each element emits light at characteristic wavelengths when energized.

Tags

NGSS.HS-ESS1-2

Front

How does temperature affect the emission spectrum of a star?

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The temperature of a star affects its emission spectrum by determining the peak wavelength of emitted light, with hotter stars emitting more light at shorter wavelengths.

Tags

NGSS.HS-PS4-3

Front

What is the relationship between the color of a star and its temperature?

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The color of a star is related to its temperature; hotter stars appear blue or white, while cooler stars appear red or orange.

Front

What is the difference between continuous and line spectra?

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A continuous spectrum shows all wavelengths of light without interruption, while a line spectrum consists of specific wavelengths emitted or absorbed by elements.

Tags

NGSS.HS-PS4-4