at what ever velocity a galaxy travells light will travell 3*10^8 m/s more than the the velocity of galaxy.then how can galaxy travell at the velocity of light
2006-10-01 20:29:33 · 7 answers · asked by arunjp1989 1 in Science & Mathematics ➔ Astronomy & Space
Galaxies aren't currently traveling at the speed of light, but according to Abraham Loeb, they are accelerating due to the big bang that created the universe and may reach light speed in about 50 billion years. When that happens, light from those galaxies will not be able to ever reach us, because our galaxy is also receding away. In other words, the light can never catch up to us.
For more information on this, check out:
http://www.space.com/scienceastronomy/universe_end_011212.html
2006-10-01 20:41:31 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Light will NEVER travel faster than the speed of light. In other words, IF you were going along at say 1/2 or .5 the speed of light through space and turned on a flashlight, you would measure the speed of the photons of light at the speed of light, not your speed AND light speed. Also, so would another stationary observer measure the photons at "c". Electromagnetic radiationwaves, part of which we can perceive as visible light but includes radio waves, X-rays, gamma rays, etc, ALL propigate at "c". Light relative to any and all observers will always be measured at the speed of light.
So, light from a galaxy will always approach you at the spped of light. However, the wavelengths can be either blue shifted or red shifted depending upon your relative motion to the observed source of light--i.e. the galaxy. But, they would still reach you at light speed. The wavelengths are simply lengthened or shortened so the frequency changes but not the speed of the waves reaching the observer. It's difficult to explain in this short forum here. But, just try to research a little about Einstein's Special Theory of Relativity. By exptrapolating upon Maxwell's equations and the fact that light speed in a vacuum is always "c", Einstein realised that neither space nor time is absolute. Space can be warped by mass or a mass's state of motion and time dilates. "c", however is the constant.
Now, I know SOMEONE is going to cry foul and mention the lab experiments which have slowed photons of light down to approx 40 miles per hour instead of the normal approx speed of 186,000miles per second. When I have referred to the "speed of light" or "c" previously, I refer to it as the more accurate: "speed of light in a vacuum".
2006-10-01 20:49:45 · answer #2 · answered by quntmphys238 6 · 2⤊ 0⤋
definite the universe can develop swifter than the speed of sunshine, and doubtless did throughout its inflationary section after the large bang (assuming that the inflation idea is authentic, it quite is a few distance from particular). the speed of sunshine is a reduce to how briskly issues can go through area, no longer a reduce on how briskly area itself can develop.
2016-12-04 03:07:34 · answer #3 · answered by samrov 4 · 0⤊ 0⤋
xcuse me!! galaxy is not travelling my dear....light year is d representation of d distance...light year is defined as the distance travelled by d light in one year at d speed of 3 lacs km per sec.
if light travels 3 lacs km only per sec, jus imagine watz d distance travelled in 1 year?
hence galaxies r soooooooooo far dat their distances r measured in light years.........understood???
2006-10-03 23:28:20 · answer #4 · answered by pioneer. 2 · 0⤊ 0⤋
Actually I don't get your question right I think that the galaxy don't .I f this is not what you were looking for then i am sorry
2006-10-01 20:35:11 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Who said that? Don't listen to any more from that idiot.
2006-10-01 20:37:37 · answer #6 · answered by MaqAtak 4 · 0⤊ 0⤋
It can't. Who says it can?
2006-10-02 02:05:21 · answer #7 · answered by campbelp2002 7 · 0⤊ 0⤋