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Is observed red shift in the light emitted by galaxies the more distant the more red shift the only evidence to conclude that the universe is expanding. Any more evidences. If so what are they?
During the time a super-nova in a very distant galaxy emits light, the first photons it emits have a head start over the last such photons -- ie, they begin to leave earlier. As such, there exists a distance between the first photons and the last photons. If that super-nova occurred over a billion years ago, AND if space is expanding over time, then the distance between the first photons and the last photons will also expand during the billions of years it takes for that distant super-nova to reach us. Because the last photons from a distant super-nova have a greater distance gap than the last photons from a nearby super-nova, distant ones will seem to last longer than nearby ones. The difference in time between the first photons and the last photons from a distant super-nova, as opposed to those from a nearby super-nova, match perfectly with the expansion in space seen in red-shift. In addition, if spatial expansion has been (more or less) constant since the earliest moments of our Universe, then at one time our Universe was far more dense than it is now, and that, at some point, the density dropped to the point where protons and electrons would combine into atoms, photons would no longer be absorbed by atoms, such photons would then be free to travel (and expand their wavelength) for billions of years, and we should observe almost perfectly isotropic microwave radiation coming from all parts of the sky. That was predicted in 1946, and observed eighteen years later -- exactly as predicted.
What creates the phenomenon known as the red shift?
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.
Does light age over time?
Well sweetheart, light doesn't age because it doesn't give a damn about time! It just zips around at the speed of, well, light, shining brightly like a glittery diva in the sky. So go ahead and bask in its eternal glow, because light is forever young and fabulous!
Photons in sun travel is a straight path on the way?
Photons released from the Sun travel through space in a straight line until they interact with matter or are absorbed by particles in the atmosphere. This uninterrupted path is what allows sunlight to reach Earth and provide energy for life on our planet.
How long does it take for photons produced in the interior of the sun to reach the surface?
Well honey, those photons take their sweet time making the journey from the Sun's core to the surface. It's like a cosmic early morning coffee run – it can take a staggering 100,000 years! So, grab a snack and pull up a chair, you'll be waiting a while for those little rays of sunshine to finally hit the surface.
Do photons decay over time?
No, photons do not decay over time.
How old are photons?
Photons do not have an age in the way we think of living organisms aging. They are massless particles that travel at the speed of light and are fundamental to the electromagnetic force, existing independent of time.
Is there more photons in brighter light?
Yes, brighter light typically means more photons are present because brighter light has a higher intensity, which is measured by the number of photons hitting a given area over time. So, in a brighter light source, there are indeed more photons emitted.
Do photons experience time?
Photons do not experience time because they travel at the speed of light, which means time does not pass for them.
How long does a photon live?
Photons do not have a lifespan, as they are massless particles that do not decay over time. They exist until they are either absorbed by matter, reflected, or pass through space indefinitely.
Do photons effect time If speed effects the time dimension and light photons move at approx 680 million mph is the time dimension effected by this speed This stupid thing won't let me use punctuation?
No, photons neither effect time nor affect time.
What changes over time?
Age.
Is observed red shift in the light emitted by galaxies the more distant the more red shift the only evidence to conclude that the universe is expanding. Any more evidences. If so what are they?
During the time a super-nova in a very distant galaxy emits light, the first photons it emits have a head start over the last such photons -- ie, they begin to leave earlier. As such, there exists a distance between the first photons and the last photons. If that super-nova occurred over a billion years ago, AND if space is expanding over time, then the distance between the first photons and the last photons will also expand during the billions of years it takes for that distant super-nova to reach us. Because the last photons from a distant super-nova have a greater distance gap than the last photons from a nearby super-nova, distant ones will seem to last longer than nearby ones. The difference in time between the first photons and the last photons from a distant super-nova, as opposed to those from a nearby super-nova, match perfectly with the expansion in space seen in red-shift. In addition, if spatial expansion has been (more or less) constant since the earliest moments of our Universe, then at one time our Universe was far more dense than it is now, and that, at some point, the density dropped to the point where protons and electrons would combine into atoms, photons would no longer be absorbed by atoms, such photons would then be free to travel (and expand their wavelength) for billions of years, and we should observe almost perfectly isotropic microwave radiation coming from all parts of the sky. That was predicted in 1946, and observed eighteen years later -- exactly as predicted.
What is the average age of a first time parent in Canada?
The average age for a first time parent in Canada is 28 years of age. The average age has gone up over the years.
Do photons Affect time if speed Affects the time dimension and light photons move at approx 680 million mph is the time dimension Affected by this speed and WHY or why not?
The affect to time caused by an object moving at relatavistic speeds (near c) is applied to the object, not to the observer.
What is the term for the small packets of energy emitted from light?
The term for the small packets of energy emitted from light is called photons.
What is lifespan of photon?
Photons, being massless particles, do not age or decay like other particles with mass. They travel at the speed of light and exist until they are absorbed or interact with other particles. Thus, photons are considered to have an indefinite lifespan.
