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The expansion of space in all parts of our Universe.
When a group of photons leave an object (like a super-nova in a distant galaxy), they have a certain wavelength, and a certain distance between the first photons from that super-nova and the last such photons.
During their travel, the expansion of space causes the wavelength of the photons to increase (even if they interact with no matter whatsover in their travels), as well as the distance between the first photons to leave and the last photons to leave.
If these photons travel for enough time (say, a few 100 million to a few billion years) before they reach a detector on our Earth, the increase in wavelength AND the distance between the first and last photons becomes measurable. The photons have a wavelength longer than they "should" have, and the time between the first photons to arrive and the last to arrive will increase. The increase in wavelength, as well as the increase in time for the super-nova to last, will be as predicted by Hubble's Law.
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What is meant by red shift and what cause it?
Red shift is the phenomenon where light from an object in space appears to have a longer wavelength, shifting towards the red end of the spectrum. It is caused by the stretching of light waves due to the expansion of the universe, known as the Doppler effect.
Does a red shift indicates that objects are moving toward earth?
Red shift occurs when an object moves away from the observer. So as you are on Earth, it is when objects move away from Earth. (Blue shift as it moves closer.) A star's red shift could be due to losing energy to gravity.
What can be created by combining red green and blue light is called?
When red, blue and green light is combined, it creates white light (theoretically).
What is an effect of the red shift?
The red shift is the phenomenon where light from an object is shifted towards the longer wavelength, making it appear more red. It is commonly used to measure the speed and distance of objects in space, such as galaxies moving away from us due to the expansion of the universe.
Observation of the red shift of galaxies suggest that the universe is what?
Expanding Or that the light is exiting a gravity hole (star).
What is the shift in the light of a galaxy toward the red wavelength called?
This phenomenon is called red shift.
What creates the phenomeon known as red shift?
Two things can cause red-shift:- The rapid motion of an object away from the observer. This is known as the Doppler-effect.- Expansion of space between the object and the observer.
What is meant by red shift and what cause it?
Red shift is the phenomenon where light from an object in space appears to have a longer wavelength, shifting towards the red end of the spectrum. It is caused by the stretching of light waves due to the expansion of the universe, known as the Doppler effect.
Does a red shift indicates that objects are moving toward earth?
Red shift occurs when an object moves away from the observer. So as you are on Earth, it is when objects move away from Earth. (Blue shift as it moves closer.) A star's red shift could be due to losing energy to gravity.
What can be created by combining red green and blue light is called?
When red, blue and green light is combined, it creates white light (theoretically).
What is important about the Hubble telescope's discovery that there is a red shift in the spectra of galaxies?
The Hubble telescope did not discover that there is a red shift in the spectra of Galaxies. The telescope is named after the American astronomer, Edwin Hubble, who discovered the phenomenon in the 1920s.
What is an effect of the red shift?
The red shift is the phenomenon where light from an object is shifted towards the longer wavelength, making it appear more red. It is commonly used to measure the speed and distance of objects in space, such as galaxies moving away from us due to the expansion of the universe.
Observation of the red shift of galaxies suggest that the universe is what?
Expanding Or that the light is exiting a gravity hole (star).
What are the two types of waves that display red shift?
The terms "redshift" and "blueshift" are used for electromagnetic waves. However, the underlying phenomenon - namely, the Doppler shift - applies to any type of wave.
What is the significance of red shift galaxies?
It means they are moving away from us.
red shift?
red shift
What is used to know what way a star is going?
We can tell that our universe is expanding because stars and galaxies we observe have a definite red tint to them. This phenomenon known as "red shift" allowed us to have evidence that our galaxy was and has been expanding. In addition to relic radiation, this helps to prove the Big Bang theory.
