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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.
What else can I help you with?
Is vacuum a medium of light?
Light can travel through vacuum, but it is not a medium.
What is the propagation direction of light in a vacuum?
The propagation direction of light in a vacuum is straight and constant.
What is the direction of propagation of light in a vacuum?
Light in a vacuum propagates in a straight line in all directions.
Can you see light in a vacuum?
No, light cannot be seen in a vacuum because light requires a medium to travel through in order to be visible. In a vacuum, there is no medium for the light to interact with, so it cannot be seen.
Does light make noise when it travels through a vacuum?
No, light does not make noise when it travels through a vacuum.
What happens when light passes through vacuum?
it travels at c (speed of light in a vacuum)
What happens to frequency does the speed of light ever change?
The speed of light IN A VACUUM is always the same. In substances other than the vacuum, the speed of light is usually slower than in a vacuum.
What happens to speed of light when they travel through a vacuum?
In a vacuum, light always travels at the same speed, about 300 000 kilometers per second.
What happens to speed of light when travel through plastic?
When light travels through anything that is not a vacuum, it will usually slow down.
What happens to speed of light from vacuum to glass?
The speed of light is greatest in vacuum, and somewhat less in any material medium. The exact number depends on the individual material. They're all different.
What happens when light travels through vacuum?
Nothing. It continues to propagate at the speed of light, and is not diffracted or distorted except by negligible gravitational effects.
The speed of light indicates how fast light can travel in a vacuum?
Yes ... in a vacuum.
Why doesn't light travel through a vacuum?
Light does travel through a vacuum.
Is vacuum a medium of light?
Light can travel through vacuum, but it is not a medium.
Does light travel at its slowest speed when passing through a vacuum?
No, light is at its fastest in a vacuum.
What is the propagation direction of light in a vacuum?
The propagation direction of light in a vacuum is straight and constant.
What happens when light passes through something?
The velocity of light is greatest when travelling through a vacuum. When travelling through something else, a glass material say, then its velocity is slower. The refractive index is the ratio of the speed of light in a vacuum to the speed of light in that substance. For example light travels in a vacuum about 1.3 times as fast as in water, so we say water has a refractive index of 1.3. And it is likely that the velocity in the glass will be different at different wavelengths of light.
