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How do astronomers use the the spectrum of an object to gain information about what object's made of?
Wiki User
∙ 15y ago
Take some pliers. Take a pin. Take some salt and put it on the pin. If you can use the the pliers to hold the pin covered with salt over and real close to a source high heat, you might see a yellow color above the pin. That yellow tells you that the product contains sodium. Scientists can look for that particular color and tell that it comes from something that contains sodium. Other elements give off different colors. By seeing what colors items give off, scientists can tell what something is made of. We used sodium because it is simply the easiest one to see.
Wiki User
∙ 15y ago
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What is a use of examining light spectra?
One use of light spectra has an application in astronomy. When looking at distant objects like galaxies, you can tell if they are moving away from you or closer to you. If the spectral light appears blue (blue-shift) it means that the object is moving toward you, if the spectral light is red (red-shift) it means that the object is moving away from you. Another astronomy application is to look at the light from a star through a spectrum and by doing so you can figure out the chemical composition of the star just by the color of its spectrum.
What happens when light strikes a opaque object?
All the light is absorbed, except that portion of the spectrum matching the object's color. That particular bandwidth is reflected. Hence a yellow object appears yellow, and a blue object appears blue. Black objects absorb light without reflecting any, while white objects reflect almost all the visible light which strikes them. The object may then emit the absorbed energy in the infrared spectrum (heat).
When Studying an object by looking at the visible light and other electromagnetic waves that the object creates is called?
spectrum
Why hypotheses are incorrectly referred to as guesses?
A hypotheses is simply and educated guess. You use the information you know to be true, to make an educated guess on what will happen. Then you continue with your experiment and see if your hypotheses was correct. The largest difference between a hypotheses and a guess is simply the amount of information you apply to the question before guessing the answer. If you state simply, "If I mashed this object and this object together, I guess Object A will break, and Object B will be just fine" That's a guess. Now, if you actually collect the information from the two objects and note that Object A is made of high carbon steel, and Object B is made of cast iron. The mashing will happen at aprox 100mph. "I Hypotheses that given the new information about the objects, and the test, Object B will crack, or split, while Object A will remain largely undamaged" Notice how much information is involved with one vs the other?
Is color a property of an object?
Yes. The colour of an object is determined by what frequenc(y/ies) of electromagnetic wave it emits in the visible spectrum. The colour of an object is a physical property of that object.
How are spectrums used to study?
Astronomers use the light spectrum of distant objects to determine the chemical composition of those objects. Each element on the period table gives off a different spectrum, and by looking through a spectrometer an astronomer can read the spectrum and figure out what that object is made up of to gain better understanding of our universe.
What will happen to an objects spectrum as the object moves away from you?
the spectrum change with direction, either from you or away
Why in Light refraction do black objects remain black?
Light "refraction" is the bending of light as it passes through a transmitting medium, Refraction has nothing to do with black objects. A black object reflects no parts of the visible part of the spectrum, it absorbs them all. A white object reflects all parts of the visible spectrum. A red object reflects the red part of the spectrum, absorbing the rest.
How can astronomers tell how much objects in space weigh?
Weight is due to gravitational forces between two objects. A single object inspace without another one reasonably nearby, or even in gravitational free-falltoward another object, is weightless. So you can not weigh an object in space.Determining the mass of objects in space is another matter.
Analyzes an object's spectrum?
A spectrometer analyses an object's spectrum.
Why do you see white object?
Light is made up of all the colours in the spectrum (rainbow). We see white objects because the white is reflected off the object and into our eyes.
Is the set of definitions of the kinds of objects and object-related information that the directory can contain?
In LDAP-compatible directories, a schema is the set of definitions of the kinds of objects and object-related information that the directory can contain.
What information can you learn about a celestial object just by measuring the peak of its black-body spectrum?
Its temperature.
When the wavelength of a spectral line emitted from an object increases which end of the visible light spectrum does not move toward and what is the objects motion relative to earth?
Increasing wavelength is an indication of a Doppler shift caused by an object moving away from the viewer. Longer wavelengths (of the visible spectrum) are redder, shorter wavelengths are bluer. Objects moving away from you have a red shift, objects moving toward you have a blue shift.
Why does an object appear red when white light is shone on it?
Because white light is made up of all the colors of the spectrum, and an object that appears red in color is simply reflecting the color red, a white object refects all the colors of the spectrum while black objects reflect no colors at all.
What is the name of the principle employed by early astronomers to determine the distances to celestial objects using the displacement of the apparent position of an object viewed along two different?
parallax
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
