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COMMENTS
Does Light Travel Forever?
In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the wave is not interacting with anything else. This is why light from distant stars can travel through space for billions of light-years and still reach us on earth. However, light can travel within some materials, like glass and water.
What is light, and how can it travel in a vacuum forever in all
How can light (or electromagnetic radiation) travel through a vacuum when there is nothing there to act as a medium, and do so forever in all directions? For example the light coming from a star millions of light years away. Light is observed as traveling at velocity v=c, according to the second postulate of special relativity. But according to ...
How Does Light Travel? Does It Travel Forever?
Since light travels like a wave, it can travel through a vacuum without interacting with anything. However, when light does go through something, that object can absorb some of it. Light travels through these objects, like glass and water, leaving heat behind. Think of a flashlight. When you turn it on and face it toward a pool, the light can ...
Why isn't the speed of light infinite?
The common experience of turning on a light switch certainly shows that light travels very quickly. But careful experiments reveal that it travels at a finite speed. ... the spikes are infinitely ...
How we found the speed of light: it's not infinite!
In the early 1600s, it was known that the speed of light was very, very fast, but it wasn't known whether it was infinitely fast or not. The only experiment done to measure it was Galileo's ...
energy
In this case c = v c = v where c c is the speed of light travelling in a vacuum (a constant) and t t seems to → ∞ → ∞ seconds based on the information given in your question. The distance the light travels depends on the time it travels for because c c is constant in a vacuum which implies: x → ∞ x → ∞.
Ask Ethan: Does light really live forever?
However, in order for this scenario to be correct, there are two predictions that should be true. 1. ) When light travels through a medium, even a sparse medium, it slows down from the speed of ...
Why Light Doesn't Actually Have a Speed Limit?
Not even light, which as far as it is concerned does travel infinitely quickly, would be able to overcome it - provided the base we were resting on was ever so slightly curved: as soon as the photon slid above the plane that was space, it would get swept up in the curvature of this hyperbolic 4d space.
Q: Why is the speed of light finite?
The question, as it was originally asked, was about what keeps light from going any faster. The answer to that question is that there is no faster. If you shove a stone of mass X and it goes flying off at speed V, then if you shove a stone of mass X/2 it'll fly off at speed 2V. So, you might suspect that if you shove a stone of zero mass that ...
How Does Light Travel?
"HOW DOES LIGHT TRAVEL?" ... In fact it should be infinitely cold. But time is no more, so technically no heat or energy is emitted anyway from any observers POV. Yet recent images of black ...
Speed of light: How fast light travels, explained simply and clearly
In fact, we now define the speed of light to be a constant, with a precise speed of 299,792,458 meters per second. While it remains a remote possibility in deeply theoretical physics that light ...
Does light travel forever or does it eventually fade?
A photon does travel forever, but it also fades as it travels across the universe. So, first about it traveling forever. An emitted photon will travel in a straight-line (straight in a spacetime sense, so mass will make it appear to be bending perhaps, but it is still going straight, we just are bad at seeing the hills and valleys of space time.
ELI5: Does Light Travel infinite distances? : r/explainlikeimfive
Yes. No but kind of yes. and finally not really, no. Yes, in that light will travel until it hits something. If it does hit something it will travel forever. No but kind of yes because light get spewed out as a cone which means a light source gets dimmer and dimmer with distance. To be able to see your flashlight from billions of light years ...
How does light travel?
So how does light travel? Basically, traveling at incredible speeds (299 792 458 m/s) and at different wavelengths, depending on its energy. It also behaves as both a wave and a particle, able to ...
special relativity
3. it doesn't move in time, so no time will have past when the light arrives at it's "destination". Right? A photon does 'move in time'. It just that, for a photon, the displacement in time, cΔt c Δ t, equals the displacement in space, Δx Δ x. However, there is no proper time for a photon. Your proper time is, in words, the elapsed time ...
Does the light that gets reflected off of us, during our existence
The equivalent extinction number for the intergalactic medium is that light travels many billions of light years with almost no chance of being absorbed (see Zu et al. 2010). This means that most of the light reflected from you will travel to cosmological distances (billions of light years) over the course of the next billions of years.
When does light travel in a straight line?
The fact that light does not exactly travel along a straight line is what gives rise to diffraction artifacts in high-quality photographs and in human vision. For instance, a high-quality photograph of stars will show spikes attached to the stars. ... The closer that a light beam is to being an infinitely-wide plane wave, the less it will diffract.
How fast does light travel?
Light travels from the moon to our eyes in about 1 second, which means the moon is about 1 light-second away. Sunlight takes about 8 minutes to reach our eyes, so the sun is about 8 light minutes ...
Does light travel forever? : r/askscience
As long as it doesn't get absorbed by something, then yes, light will continue to travel indefinitely. However, due to the expansion of the universe that light wave will get stretched out along with the space it travels through, becoming lower in frequency and energy. This is why the Cosmic Microwave Background, which began its existence as ...
Can anything travel faster than the speed of light?
When light travels through a vacuum, however, the same is not true. "All light is a type of electromagnetic wave, and they all have the same speed in a vacuum (3 x 10^8 meters per second).
Scientists Make Light Travel Infinitely Fast
In empty space, light travels at 300,000,000 meters per second—the maximum speed possible, according to Einstein's theory of relativity. However, in some materials—say, water or glass—it ...
If traveling at the speed of lights stops time, why does it take light
It's illogical to say that light "travels" because light doesn't move, because light doesn't experience time. As this article on Phys.org describes it, the "time" that it takes light to travel from a point of origin to a destination has been reduced all the way to 0. We misunderstand light as "traveling" only because our perspective does ...
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COMMENTS
In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the wave is not interacting with anything else. This is why light from distant stars can travel through space for billions of light-years and still reach us on earth. However, light can travel within some materials, like glass and water.
How can light (or electromagnetic radiation) travel through a vacuum when there is nothing there to act as a medium, and do so forever in all directions? For example the light coming from a star millions of light years away. Light is observed as traveling at velocity v=c, according to the second postulate of special relativity. But according to ...
Since light travels like a wave, it can travel through a vacuum without interacting with anything. However, when light does go through something, that object can absorb some of it. Light travels through these objects, like glass and water, leaving heat behind. Think of a flashlight. When you turn it on and face it toward a pool, the light can ...
The common experience of turning on a light switch certainly shows that light travels very quickly. But careful experiments reveal that it travels at a finite speed. ... the spikes are infinitely ...
In the early 1600s, it was known that the speed of light was very, very fast, but it wasn't known whether it was infinitely fast or not. The only experiment done to measure it was Galileo's ...
In this case c = v c = v where c c is the speed of light travelling in a vacuum (a constant) and t t seems to → ∞ → ∞ seconds based on the information given in your question. The distance the light travels depends on the time it travels for because c c is constant in a vacuum which implies: x → ∞ x → ∞.
However, in order for this scenario to be correct, there are two predictions that should be true. 1. ) When light travels through a medium, even a sparse medium, it slows down from the speed of ...
Not even light, which as far as it is concerned does travel infinitely quickly, would be able to overcome it - provided the base we were resting on was ever so slightly curved: as soon as the photon slid above the plane that was space, it would get swept up in the curvature of this hyperbolic 4d space.
The question, as it was originally asked, was about what keeps light from going any faster. The answer to that question is that there is no faster. If you shove a stone of mass X and it goes flying off at speed V, then if you shove a stone of mass X/2 it'll fly off at speed 2V. So, you might suspect that if you shove a stone of zero mass that ...
"HOW DOES LIGHT TRAVEL?" ... In fact it should be infinitely cold. But time is no more, so technically no heat or energy is emitted anyway from any observers POV. Yet recent images of black ...
In fact, we now define the speed of light to be a constant, with a precise speed of 299,792,458 meters per second. While it remains a remote possibility in deeply theoretical physics that light ...
A photon does travel forever, but it also fades as it travels across the universe. So, first about it traveling forever. An emitted photon will travel in a straight-line (straight in a spacetime sense, so mass will make it appear to be bending perhaps, but it is still going straight, we just are bad at seeing the hills and valleys of space time.
Yes. No but kind of yes. and finally not really, no. Yes, in that light will travel until it hits something. If it does hit something it will travel forever. No but kind of yes because light get spewed out as a cone which means a light source gets dimmer and dimmer with distance. To be able to see your flashlight from billions of light years ...
So how does light travel? Basically, traveling at incredible speeds (299 792 458 m/s) and at different wavelengths, depending on its energy. It also behaves as both a wave and a particle, able to ...
3. it doesn't move in time, so no time will have past when the light arrives at it's "destination". Right? A photon does 'move in time'. It just that, for a photon, the displacement in time, cΔt c Δ t, equals the displacement in space, Δx Δ x. However, there is no proper time for a photon. Your proper time is, in words, the elapsed time ...
The equivalent extinction number for the intergalactic medium is that light travels many billions of light years with almost no chance of being absorbed (see Zu et al. 2010). This means that most of the light reflected from you will travel to cosmological distances (billions of light years) over the course of the next billions of years.
The fact that light does not exactly travel along a straight line is what gives rise to diffraction artifacts in high-quality photographs and in human vision. For instance, a high-quality photograph of stars will show spikes attached to the stars. ... The closer that a light beam is to being an infinitely-wide plane wave, the less it will diffract.
Light travels from the moon to our eyes in about 1 second, which means the moon is about 1 light-second away. Sunlight takes about 8 minutes to reach our eyes, so the sun is about 8 light minutes ...
As long as it doesn't get absorbed by something, then yes, light will continue to travel indefinitely. However, due to the expansion of the universe that light wave will get stretched out along with the space it travels through, becoming lower in frequency and energy. This is why the Cosmic Microwave Background, which began its existence as ...
When light travels through a vacuum, however, the same is not true. "All light is a type of electromagnetic wave, and they all have the same speed in a vacuum (3 x 10^8 meters per second).
In empty space, light travels at 300,000,000 meters per second—the maximum speed possible, according to Einstein's theory of relativity. However, in some materials—say, water or glass—it ...
It's illogical to say that light "travels" because light doesn't move, because light doesn't experience time. As this article on Phys.org describes it, the "time" that it takes light to travel from a point of origin to a destination has been reduced all the way to 0. We misunderstand light as "traveling" only because our perspective does ...