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If you set off at light speed then if you look behind you everything will look exactly like at the moment you left.
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∙ 12y ago
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What happens if you could travel at the speed of light or faster?
you would never get old, but you wouldn't be able to see yourself
Why cant we see stars during the day?
We can, t see the stars in a day beacues the light of sun is very bright comparatively to the stars thes reason
Why you see a distant event before you hear it?
Because the speed of light is much faster than the speed of sound. Therefore, when the light from that event reaches your eyes, you see it. Then later, the sound from the event reaches your ears, and you hear it. Basically it's just because light travels faster than sound.
Can visible light travel through space?
Light can travel through space. All the light that we get on the earth's surface; usually travels from the sun through space before it can reach here.
What does it mean when people look up at the stars and say seeing them how they were millions of years ago?
Generally speaking, this is a gross exaggeration. You see the stars as they were, at most, a few centuries ago. The reason is the light travels at a limited speed. In other words, it takes time to reach you. Distance between stars is measure in light years, which is the distance that light travels in a year. For example, if you look at a star that is 100 light years away, the light you see now left it 100 years ago. The stars you see at night are within the small part of our galaxy that is closest to us. Those stars are at most a few hundred light years away. A handful are less than 10 light years away. The only thing you can with the naked eye see as it was millions of years ago is the Andromeda galaxy, a massive collection of stars 2.5 million light years away. With a telescope you can see farther galaxies.
How do we know light can travel through outer space?
We can see stars.
Why is light you see from stars several years old?
it takes light long to travel so you see it late
Can light waves travel on a vacuum?
I think they can, since that's how you see the sun and the stars.
What kind of waves do not need a medium to travel through?
Light. electromagnetic waves. **but be careful. Light is also a particle AND a wave. The light particle is called a photon, and although it always travels at the same speed (the speed of light) it can have different wavelengths. This is why we still see light from the Sun and stars. There is no medium in space, but since light does not need a medium to travel through, light can be observed still from great distances in the universe.
Can a light travel through a vacuum?
Yes. Refer to stars - space is a vaccuum (though not a perfect vaccuum) and because light can travel through a vaccuum, we have day and night here on Earth. We can even see light from other stars light years away.
How do you travel through the universe?
You had better travel near the speed of light or you will not see much of the universe. Unfortunately travelling near the speed is not yet possible, so you are out of luck.
If you were travelling faster than light could you still see an object in front of you?
You cannot travel at the speed of light. Period.
Why you can see the stars?
we an see the stars because stars give out light.
Is there light in outerspace?
You mean, light such as comes from stars like the Sun? That kind of light? In outer space, where the stars are? In that big vast open place that the light has to travel across before we see it ? Gee, that's a tough one.
Can Electromagnetic radiation travel through a vacuum at a constant speed regardless of wavelength?
Yes. That is why we see light from distant stars, and use radio telescopes to see even older (more distant) structures. It might be easier to imagine light has having particle properties and wave properties both. Light arrives in discrete packets of energy (particles), yet can be "guided" and "directed" like waves.
What happens to light in a vacuum?
It depends on what are you asking for. If the question is related to the speed, then nothing occurs. If it is related to absortion, then you do not have absortion and you can "see" it from far, far away. "Light" is an electromagnetic wave. As all of them, its speed is independent of the medium in which travel. They do not need a physical medium to travel (in contrast to pressure waves, like the sound). The speed of light (defined as c = 3·108 m/s) is the same everywhere in the Universe. Of course, any material medium cause absortion. Due to this it is impossible to see object which are far away, because the atmosphere absorbe the energy of the light. In the outer space, opposite to this, you have almost a "vacuum", so you can see star's light which comes from light-year distance. As the medium is the vacuum, the light doesn't have absortion and it travel a lot. You have of course some regions with dust, so you do not see all the stars in the Universe.
How is looking up at the night sky considered time travel?
The light you see are from stars long dead and so when you look into the night you see back into the time when these stars shone brightly . It took light-years for this light to reach across time and space to be seen by your eyes .
