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What else can I help you with?
When light waves are stretched by an object moving away from us?
The light waves are redshifted, meaning their wavelengths increase and their frequencies decrease. This effect is due to the Doppler effect, where the motion of the object causes a shift in the observed wavelength of light.
What is the red shift of light from most galaxies is evidence that?
The most plausible explanation for the redshift is that galaxies are moving away from us. This is similar to the Doppler effect, but it is normally believed that space itself is expanding, so the situation is a bit different from the "normal" Doppler effect.
A Doppler red shift indicates?
that an object is moving away from an observer. This red shift occurs because the wavelength of light is stretched as the object moves farther away, causing it to appear more red. This effect is commonly seen in astronomy with galaxies moving away from us due to the expansion of the universe.
What does a red-shift mean?
A redshift refers to the phenomenon where light from an object, such as a galaxy, is shifted toward longer wavelengths, or the red end of the spectrum. This effect is primarily caused by the Doppler effect, where objects moving away from an observer appear to have their light stretched. In astronomy, redshift is often used to indicate that an object is receding from us, which supports the expansion of the universe. The greater the redshift, the faster the object is moving away, providing insights into the universe's age and the rate of its expansion.
What does a distant galaxy having a greater red shift indicate about the universe?
A red-shift caused by the Doppler-effect indicates that the object is rapidly moving away from the observer.Note that at extreme distances, red-shift is not caused by the Doppler-effect, but primarily by the expansion of space between the object and the observer.
What does the Doppler Effect tell astronomers about the universe?
It tells us that the Universe is expanding.
How can you tell that some galaxies are far away and moving rapidly towards us?
You can tell by the blueshift in the spectrum; the only reasonable explanation for this blueshift is the Doppler effect. - Please note that most galaxies are moving away from us, not towards us.
What does the Doppler affect tell us?
The Doppler effect tells us that the frequency of a wave changes when the source of the wave or the observer is in motion relative to one another. This change in frequency results in a shift in the perceived pitch of sound waves or the perceived color of light waves.
How is the Doppler effect used in astromomy?
It is used to determine whether an object is approaching us, or moving away from us. It turns out that - as can be seen from the Doppler effect - most galaxies are moving away from us. In other words, the Universe is expanding.
The apparent change in frequency as a wave source moves in relation to the listener is called?
The Doppler effect is that apparent change of the frequency of a moving object when someone is stationary. A car may seem to get louder as it gets closer to a person and then the sound will drop as the car gets away.
The blank effect allows us to use the spectrum to study a source's motion?
The Doppler effect allows us to use the spectrum to study a source's motion. This effect causes a shift in the wavelengths of light emitted by a moving source, which can be detected and used to determine the direction and speed of the source's motion relative to the observer.
Do you use the Doppler effect or particle accelerators to measure the speed of stars?
The Doppler effect is used to detect whether a star is moving away from us or towards us. This method doesn't tell us anything about a star's "sideways" movement. OR The Doppler Effect should be corrected for the (gravitational) size of the star, since gravity also changes the light's energy. re: Sideways movement, I thought special relativity reacts to sideways motions? Besides, how long can a star be traveling sideways -- technically, no distance.
How can the Doppler effect help us?
By determining the speed of an object, towards or away from the observer.
Does a star that shows no Doppler shift move?
If there is no observable Doppler shift, then the star is probably not moving very fast. This refers to the component of the star's movement toward us, or away from us - the "sideways" part of the movement can't be determined by the Doppler effect.
Is the Doppler effect the actual change in a stars frequency of a wave?
No, the Doppler effect is the perceived change in frequency or wavelength of a wave when there is relative motion between the source of the wave and the observer. In the context of stars, the Doppler effect is used to measure their radial velocity, which can be used to determine if the star is moving towards or away from us based on shifts in the wavelength of its light.
What did the us do after the 1957 launch of sputnik?
Observed it and found out that the amplitude of beeps from it changes because of the Doppler effect.
How can you measure how fast the universe is expanding?
By using some method other than the Doppler effect to calculate the distance of a distant galaxy, and using the Doppler effect to see how fast it moves away from us. A galaxy's distance and how fast it moves away from us are roughly proportional.
