Term
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Definition
All objects emit radiation in forms of electromagnetic waves
T/F |
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Term
Higher temp
Higher level of internal motions/vibrations
More light |
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Definition
| What characterisitics do hotter objects have? |
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Term
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Definition
| Splits incoming light into its components at different wavelengths |
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Term
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Definition
| absorbs and re-emits all radiation landing on it |
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Term
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Definition
| Distinctive pattern in which objects emit radiation |
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Term
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Definition
All blackbody spectra have the same characteristic shape
T/F |
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Term
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Definition
| Temperature scale used in astronomy |
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Term
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Definition
| lowest point on the kelvin scale |
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Term
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Definition
| law that says light from hot objects peaks at short wavelengths and cool objects peak at long wavelengths |
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Term
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Definition
| Rate at which energy is emitted from an object |
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Term
| Temperature & Surface Area |
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Definition
| Blackbodies luminosity depends on what two things |
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Term
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Definition
Law about how luminosity surface area and temperature are related for blackbodies
who is he |
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Term
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Definition
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Term
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Definition
| smooth variation of intesity with wavelength, often roughly in the shape of a blackbody |
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Term
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Definition
| spectra which lacks radiation at most wavelengths, |
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Term
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Definition
| Similar to continuous spectra, but miss radiation at certain specific wavelengths |
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Term
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Definition
| Person who was able to describe the different types of spectras |
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Term
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Definition
| Hot objects with dense gas produces this type of spectrum |
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Term
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Definition
| Low-density hot gas produces this type of spectrum |
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Term
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Definition
| cool gas in front of a continuous source of light produces this type of spectrum |
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Term
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Definition
| "Building Blocks" that all matter consists of |
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Term
| Protons, neutrons, electrons |
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Definition
| what atoms are made up of |
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Term
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Definition
| Innermost region of atom where protons and neutrons are found |
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Term
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Definition
| lowest energy level available |
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Term
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Definition
| when a photon is absorbed, the electron moves to a higher energy level |
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Term
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Definition
| light sources that are moving towards us have their radiation shifted to shorter wavelengths |
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Term
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Definition
| light sources moving away from us have their radiation shifted to longer wavelengths |
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Term
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Definition
| scale that measures brightness of star between 1[brightest] and 6[faintest] |
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Term
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Definition
| technique which measures stars distance |
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Term
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Definition
| what stars are made out of |
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Term
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Definition
| two components of interstellar matter |
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Term
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Definition
| Stars which have failed in becoming into one and have 8 % of the suns mass |
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Term
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Definition
| more than 90% of interstellar matter is made up of what? |
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Term
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Definition
| stars that use their fuel up quickly(hydrogen and helium in core) lasts a few million years |
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Term
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Definition
| stars that use up their fuel slowly and may spend up to trillions of years |
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Term
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Definition
| if a star is this percent of the suns mass it cannot produce enough heat for nuclear fussion |
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Term
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Definition
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Term
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Definition
| process of burning helium explosively in core |
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Term
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Definition
| where stars are formed, often hundred of them are formed here |
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Term
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Definition
| these stars are formed in same area and are often same age |
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Term
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Definition
| tens or hundreds of stars losely grouped in a larger diameter up to 10 ly in diameter |
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Term
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Definition
| larger stars compacted in a circular figure often are very old |
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Term
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Definition
Light which originates in hydrogen atoms in which electrons have jumped from the high
levels to the level n=2 will be part of which series of spectral lines? |
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Term
| the measured wavelength is longer than the emitted wavelength |
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Definition
When electromagnetic radiation (e.g. light) is Doppler-shifted by motion of the source away
from the detector, |
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Term
|
Definition
How many stars (other than our Sun) have an angle of parallax greater than one second of
arc? |
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Term
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Definition
| The relative brightness of stars as we see them in our sky are represented by their |
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Term
|
Definition
Which of the following letters representing spectral classification signifies the hottest stellar
surface temperature? G,B,K, or A |
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Term
| Luminosity and surface temperature |
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Definition
What are the two physical parameters of stars which are plotted in the Hertzsprung-Russell
diagram? |
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Term
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Definition
| What is the most abundant element in the Universe? |
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Term
| dust and gas, both atomic and molecular. |
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Definition
| The space between stars is known to contain |
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Term
|
Definition
| lowest energy level available |
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Term
|
Definition
| when a photon is absorbed, the electron moves to a higher energy level |
|
|
Term
|
Definition
| light sources that are moving towards us have their radiation shifted to shorter wavelengths |
|
|
Term
|
Definition
| light sources moving away from us have their radiation shifted to longer wavelengths |
|
|
Term
|
Definition
| scale that measures brightness of star between 1[brightest] and 6[faintest] |
|
|
Term
|
Definition
| technique which measures stars distance |
|
|
Term
|
Definition
| what stars are made out of |
|
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Term
|
Definition
| two components of interstellar matter |
|
|
Term
|
Definition
| Stars which have failed in becoming into one and have 8 % of the suns mass |
|
|
Term
|
Definition
| more than 90% of interstellar matter is made up of what? |
|
|
Term
|
Definition
| stars that use their fuel up quickly(hydrogen and helium in core) lasts a few million years |
|
|
Term
|
Definition
| stars that use up their fuel slowly and may spend up to trillions of years |
|
|
Term
|
Definition
| if a star is this percent of the suns mass it cannot produce enough heat for nuclear fussion |
|
|
Term
|
Definition
|
|
Term
|
Definition
| process of burning helium explosively in core |
|
|
Term
|
Definition
| where stars are formed, often hundred of them are formed here |
|
|
Term
|
Definition
| these stars are formed in same area and are often same age |
|
|
Term
|
Definition
| tens or hundreds of stars losely grouped in a larger diameter up to 10 ly in diameter |
|
|
Term
|
Definition
| larger stars compacted in a circular figure often are very old |
|
|
Term
|
Definition
Light which originates in hydrogen atoms in which electrons have jumped from the high
levels to the level n=2 will be part of which series of spectral lines? |
|
|
Term
| the measured wavelength is longer than the emitted wavelength |
|
Definition
When electromagnetic radiation (e.g. light) is Doppler-shifted by motion of the source away
from the detector, |
|
|
Term
|
Definition
How many stars (other than our Sun) have an angle of parallax greater than one second of
arc? |
|
|
Term
|
Definition
| The relative brightness of stars as we see them in our sky are represented by their |
|
|
Term
|
Definition
Which of the following letters representing spectral classification signifies the hottest stellar
surface temperature? G,B,K, or A |
|
|
Term
| Luminosity and surface temperature |
|
Definition
What are the two physical parameters of stars which are plotted in the Hertzsprung-Russell
diagram? |
|
|
Term
|
Definition
| What is the most abundant element in the Universe? |
|
|
Term
| dust and gas, both atomic and molecular. |
|
Definition
| The space between stars is known to contain |
|
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Term
|
Definition
| spectral classification hottest to coolest |
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