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Light is an electromagnetic wave and all electromagnetic waves travel at the speed of light. All massless particles travel at the speed of light too.

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0The limit is the speed of light; any material object can go just below the speed of light, but never quite reach it.The limit is the speed of light; any material object can go just below the speed of light, but never quite reach it.The limit is the speed of light; any material object can go just below the speed of light, but never quite reach it.The limit is the speed of light; any material object can go just below the speed of light, but never quite reach it.

They never have any other speed, neither higher nor slower, so they don't need to 'reach' it.

No such thing would happen. Matter cannot reach the speed of light, only massless things can (and they cannot travel at any other speed than the speed of light).

There's no reason that infrared light should move at a speed different from the speed of any other wavelength of light, or for that matter, the speed of any other form of electromagnetic radiation. The speed of infrared light is simply the speed of light in whatever medium it happens to find itself at the moment.

No. Particles like photons, that travel ONLY at the speed of light, can do that; other particles (or any material objects made up of such particles) can approach the speed of light, but never quite reach it.

from a purely mathematical stand point, if something were to reach the speed of light the time dialation/length contraction formula would yield something over 0. This is beacuse the formula is: constant/[(1-(velocity/speed of light)^2] as you can see, if velocity=speed of light, you get something over zero.

The time taken would be infinite. As any body with mass approaches the speed of light, it takes more and more force to accelerate it to c. You can never reach the exact speed of light.

That depends on the speed of the spaceship. If it were traveling at the speed of light, which is the maximum speed that any object can reach, it would take 640 years to get there.

Because as you speed up, your mass increases. If you reached the speed of light,your mass would be infinite, and it would take an infinite amount of energy to goany faster.Since you're moving slower than the speed of light right now, you would need to passthrough every speed between your speed right now and faster than light, withoutskipping any speeds, and we know that you couldn't reach the speed of light becauseyour mass would become infinite there. Since you can't even reach the speed of light,you definitely can't pass it and go faster.

According to the Special Theory of Relativity, this isn't possible. One of the reasons is that it would require an infinite energy to speed up an object to the speed of light - and it would acquire an infinite mass.

The speed of light does not have any media.

For any wave:wavelength x frequency = speedSpeed of light, in this case.For any wave:wavelength x frequency = speedSpeed of light, in this case.For any wave:wavelength x frequency = speedSpeed of light, in this case.For any wave:wavelength x frequency = speedSpeed of light, in this case.

It has been proven that the speed of light (about 3 x 108 meters per second) is the maximum speed any object can reach.

The speed of light. 300,000 km/h, is the fastest speed of any object in the universe.

The speed doesn't have any effect on the speed of light.

No. Not even one thousandth of the speed of light.

As far as we understand physics today, we won't ever be able to get to the speed of light. The faster you go, the harder it gets to go any faster. So that last little fraction will "always" remain impossible - or at least until someone invents a whole new branch of physics. So the only ships that can reach the speed of light are the ones in our imagination.

1) No physical object, such as an astronaut, that normally moves at a slower speed, can move at the speed of light. It might be possible to approach the speed of light, but not quite reach it. 2) No technology is currently known that can speed up an astronaut (and his ship, of course) close to the speed of light. 3) Any such technology could be called an "engine".

The speed of light in any material is . . .(speed of light in vacuum)/(index of refraction of the material)

The speed of light in any medium isspeed of light in vacuum/refractive index of that medium.

It can travel at any speed, from zero to near the speed of light.

If an object has rest mass (any at all) then just to reach the speed of light would require infinite energy - that's more energy than the universe contains. If it has zero rest mass (say a photon) then it travels - always - at the speed of light.

No. Let's consider a car that can go from zero to 60 in 1 second ! That's about 2.75 the accelerationof gravity, so it would push the driver back in his seat with 2.75 times his normal weight. But let'sassume he's tough and it doesn't bother him.He would have to keep the pedal to the metal and continue accelerating at that rate for 13 daysin order to reach 1/10th the speed of light.No man-made vehicle has ever yet carried enough fuel to reach any speed that was at all comparableto light speed.

No it doesn't. The scenario is completely unrealistic anyway, because if it has any mass at any slower speed, then at the speed of light its mass is infinite.

For any electromagnetic wave in any substance:(the wave's wavelength) times (the wave's frequency) = (the speed of light in that substance)

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