Well first of all, you don't. No object that has any mass when it's sitting still will ever
travel at light speed.
To answer your question in general: If you're sitting inside a spaceship, sipping a cup
of coffee and Surfing the web, and you decide to take a break from your back-breaking
labor and step outside for a few minutes, then the moment you're outside, you continue
traveling at the same speed and in the same direction that the ship was when you let go
of it.
If the ship is traveling with constant velocity ... constant speed in a straight line ... then
you seem to float motionless next to it, because your speed and direction are exactly
the same as the spaceship's. If the ship is accelerating, then you keep the speed and
direction that you and it had when you let go, and the ship goes on its own merry way,
leaving you behind, beside, or ahead.
For the traveller, the trip takes 1 year, travelling at 60% the speed of light (or 0.6C). This would mean that he will perceive himself as have travelled 0.6 light years (a distance of about 9.46x1012km). To calculate the time that has elapsed on Earth, you can use this simplified equation: Spaceship Time = Earth Time x sqrt[1-(v/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6c/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6)2] Spaceship Time = Earth Time x sqrt[1-0.36] Spaceship Time = Earth Time x sqrt[0.64] Spaceship Time = Earth Time x 0.8 Spaceship Time = 1 year 1 year spaceship = Earth Time x 0.8 Earth Time = 1 year spaceship / 0.8 Earth Time = 1.25 years Thus, after 1 year has passed for the person on the spaceship, 1.25 years have passed on Earth.
Light waves ALWAYS travel at the "Speed of Light"....based on the medium that the waves are traveling through. It just so happens that they go the FASTEST in a VACUUM.
If speed approaches the speed of light, the mass of any object will increase. This is not just theory; it is observed on a daily basis. Not with spaceships, of course; the technology is not ready yet - but with subatomic particles in accelerators.
The ray is diffracted so that its path moves closer to the normal at the point of incidence.
When light traveling at an angle passes from one material into another, it undergoes refraction. Refraction is the bending of light as it passes from one medium to another, due to the change in the speed of light. The degree to which the light bends depends on the angle of incidence and the refractive indices of the materials involved.
About 4.2 years.
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.
To an outside observer a person traveling at the speed of light would be frozen in time. To the person traveling at the speed of light, things would seem normal.
It will appear to slow to outside observers. That is, a twin going on a spaceship near the speed of the light will return to earth younger than his twin.
The part about the spaceship going with the speed of light is not real. I don't understand the earlier part of the question.
For the traveller, the trip takes 1 year, travelling at 60% the speed of light (or 0.6C). This would mean that he will perceive himself as have travelled 0.6 light years (a distance of about 9.46x1012km). To calculate the time that has elapsed on Earth, you can use this simplified equation: Spaceship Time = Earth Time x sqrt[1-(v/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6c/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6)2] Spaceship Time = Earth Time x sqrt[1-0.36] Spaceship Time = Earth Time x sqrt[0.64] Spaceship Time = Earth Time x 0.8 Spaceship Time = 1 year 1 year spaceship = Earth Time x 0.8 Earth Time = 1 year spaceship / 0.8 Earth Time = 1.25 years Thus, after 1 year has passed for the person on the spaceship, 1.25 years have passed on Earth.
Light waves ALWAYS travel at the "Speed of Light"....based on the medium that the waves are traveling through. It just so happens that they go the FASTEST in a VACUUM.
a spaceship. Or the light. I think that is the fastest thing.
If speed approaches the speed of light, the mass of any object will increase. This is not just theory; it is observed on a daily basis. Not with spaceships, of course; the technology is not ready yet - but with subatomic particles in accelerators.
In theory you would not see them because there is no way of the light getting to you because for that to happen you would need to travel slower than the light or the light would have to be coming from the opposed direction
I have the impression that light is not affected by magnetic fields - at least in a vacuum. If traveling through other substances, the magnetic field can change the light's polarization.
The speed of light contains distance and time, it compares how far a photon goes in a unit of time. If I understand you correctly, you are looking to compare such a relationship to time once again. Like a hypothetical spaceship traveling faster than the speed of light. If it travels one light year in a day instead of a year, that would be a light-year per day, or say, 365 lights.