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According to special relativity, the energy of an object with rest mass m and speed v is given by γmc2, where γ = 1/√1 − v2/c2 is the Lorentz factor. When v is zero, γ is equal to one, giving rise to the famous E=mc2 formula for mass-energy equivalence. The γ grows rapidly with v and approaches infinity as v approaches c. It would thus take an infinite amount of energy to accelerate a massive object to the speed of light. The speed of light is the upper limit for the speeds of massive objects.
More generally, it is normally impossible for any information or energy to travel faster than c. One reason is that according to the theory of special relativity, if something were travelling faster than c relative to an inertial frame of reference, it would be travelling backwards in time relative to another frame,[Note 5] and causality would be violated.[Note 6] In such a frame of reference, an "effect" could be observed before its "cause". Such a violation of causality has never been recorded, and would lead to paradoxes.[Note 7]
The thing I don't understand...is if you reach half the speed of light for example...how is it that light will still pass you as quick as it would if you were on Earth? Wouldn't that mean that the speed of light is now faster since your already going half the speed of light but from your perspective light still seems to whiz past you with the same velocity...I just can't understand that concept...
In other words, are they affected by gravity? I'm not sure to be honest...I know photons can be affected by the density and structure of a substance, hence we get refraction when they enter a different substance...they probably are affected by gravity but we can't measure the effects of that either...otherwise we'd have to conclude they have mass...and we haven't...
They are effected by gravity wells yes?
The pair say they have conducted an experiment in which microwave photons - energetic packets of light - travelled "instantaneously" between a pair of prisms that had been moved up to 3ft apart.
The scientists were investigating a phenomenon called quantum tunnelling, which allows sub-atomic particles to break apparently unbreakable laws.