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When the wavelength of a spectral line emitted from an object decreases which end of the visible light spectrum does it move toward and what is the object and motion relative to Earth?
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What is the best way to determine a galaxy's redshift?
Take a spectrum of the galaxy, and measure the difference in wavelength of spectral lines from the wavelengths of those same lines as measured in the laboratory
Does the velocity of a star toward or away from earth determine measuring the shift of its spectral lines?
Yes. If the star is moving away from the Earth, its spectral lines will shift towards the red end of the spectrum. If it is moving towards the Earth, its spectral lines will shift towards the violet end of the spectrum. This is due to Doppler effect.
The set of spectral lines that we see in star's spectrum depends on the stars?
Chemical composition ;-)
How do you calculate red shift?
The spectrum of light emitted from heated hydrogen has dark lines, caused by the absorption of a very narrow wavelength band of light. These dark lines always take the same location relative to each other. If all the lines in an object's spectrum are shifted by the same amount, towards the red end of the visible spectrum, then the light is "red shifted." The amount of the shift is often described with a number 'z', where z equals the shift in wavelength divided by the wavelength as originally emitted by the object.
Is the color of star an effect of its temperature?
Yes. The apparent colour of a star is related to the peak wavelength of the light it emits. According to Wien's displacement law (look it up in Wikipedia) the peak wavelength is inversely proportional to the temperature. The higher the temperature, the shorter the peak wavelength. Wavelength decreases as one moves from red to blue in the visible spectrum, so a red star is cooler than a blue one.
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant obect we say that the object's spectrum is?
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant object. We say that the object's spectrum is red shifted.
When the wavelength of a spectral line emitted from an object decreaseswhich end of the visible light spectrum does it move towardand what is the objects motion relative to earth?
When the wavelength decreases, that's known as a "blue shift", becausethe color of any visible light shifts toward the blue end of the spectrum.That phenomenon is associated with a light source that's moving TOWARDthe observer.
Why the distances between the lines for the hydrogen spectrum decreases with the decrease in wavelength?
Just one line for hydrogen.
What is a radio wave's relative wavelength and frequency compared to other waves in the Electro-Magnetic Spectrum?
Radio waves are the lowest frequency (and therefore longest wavelength) waves in the electromagnetic spectrum.
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.
What is the best way to determine a galaxy's redshift?
Take a spectrum of the galaxy, and measure the difference in wavelength of spectral lines from the wavelengths of those same lines as measured in the laboratory
What is spectral evidence?
what is spectral evidence Spectrum (spectral) refers to different frequencies of light associated with a substance.
What is''spectral evidence?
what is spectral evidence Spectrum (spectral) refers to different frequencies of light associated with a substance.
What was the largest wavelength?
As far as visible spectral lines are concerned, red has the largest wavelength. If we consider electromagnetic spectrum, then radio waves could be considered as longer wavelengths. Even longer are long waves.
How is color measured?
Color is measured in several ways, including wavelength relative to the light spectrum, intensity, and purity of tone.bright and dark
What is a small point of the electromagnetic spectrum?
In general it can be called a single frequency or a single wavelength. In the infrared, visible, and ultraviolet bands it can be called a spectral line. In the visible band it can be called monochromatic.
What happens when a star's spectrum is redshifted as a result of the Doppler effect?
With respect to light, the Doppler effect refers to the apparent change in the frequency (and wavelength) of electromagnetic radiation due to the relative motion of the source relative to the observer. When the source (i.e. a star) moves AWAY from the observer, there is an apparent rarefaction (expansion) in the wavelength of emitted light (i.e. frequency decreases), causing a shift in the emission spectrum towards the red side. This is known as redshifting --> the star is moving away from the observer. The opposite happens in blueshift, when the source moves towards the observer.
