albert einstein says?

Question

albert einstein says you cant travel faster than the speed of light, if that is so,the distances we need to travel would take to long.if i were in a machine that was travelling the speed of light that shot another machine at the speed of light, surely that machine would be travelling twice the speed of light

you don't really know do you

you all talk a load of twaddle. einstein is wrong. you're just repeating what you've read but make it sound like you actually know. if you look at the bbc web sight, it has been acheived.

Answer 1

No....go back to school

Answer 2

The speed of light in our own local space where it has been measured varies only slightly. The formula for determining velocity of a moving mass inside the (waters) the substance of space, is a function of the space pressure(Curvature) and the Density of the moving mass structure.
Since light is the micromass that forms all structures it is the fastest moving mass of the Universe.

Einstein Relativity addition of velocities of two machines aproaching each other having the same mass but different velocities, would have a combined collison velocities which would be less then their relative velocities.
For example if the relative velocity was the sum of the two moving machine velocity,Vs. the colision velocity would be calculated as Vc1^2 +Vc2^2=Vr^2
The Collison velocity Vr, would be equal to the 1.41 xVc1 which would be less than Vs.(assuming the space machines were moving both at the same velocity)
So when talking about Einstein addition of velocity formula , its not a relative velocity. This is where the misconception occured between Galilean Relativity and Einstein Relativity.

If is a gross mass structure was to move at the same speed of light it would breakup into its component micromasses which would fly out at the speed of light. So the gross moving mass has lost its original structure.

Therfore no man made machine can go faster then micromasses of light.

Its so simple to Understand that even your teacher couldnot explain it any better.

Answer 3

OK, you are in a space craft travelling close to the speed of light and you fire a rocket, why doesn't it travel faster than the speed of light.

Three things happen when you approach the speed of light, mass increases, length contracts and time dilates. All of these affect your measurement of velocity and momentum. From your perspective the rocket races away from you at say 3000km/h however from the perspective of an outside observer the rocket creeps away from your space craft at a few km/h.

This is because to the outside observer the increase in velocity is inversly proportional to 1-1/c^2. The closer you get to the speed of light the smaller the additional velocity gets so that you can never actually reach the sped of light.

Answer 4

That's what you'd think--but that's not actually what happens.

First, a small but significant point: Einstein also said you can't travel AT the speed of light either (if you have any mass).

But let's say "99% of the speed of light" instead. That is allowed. According you your argument (and common sense), it seems like if my machine is going at 99% c, and then I shoot another machine out at 99% c, the second machine ought to be going at 1.98 times the speed of light (as seen from some "stationary" observer).

But no. One consequence of the theory of relativity is that you cannot add velocities in the "normal" way.

"Normal" way: Velocity "A" plus Velocity "B" equals "A+B"

Relativistic way: Velocity "A" plus Velocity "B" equals "(A+B)/(1 + AB/c²)"

And it turns out (as you can verify), that whenever A and B are both less than the speed of light (c), then the result of that formula is ALSO less than c.

Applying that to our example: the stationary observer sees the second machine traveling at 99.9949% of the speed of light. Certainly faster than the first machine, but still not greater than c.

So the stationary observer sees Machine #2 just barely creeping ahead of Machine #1 (well, relatively speaking). Meanwhile, the guy in Machine #1 doesn't see that at all--HE thinks Machine #2 has a tremendous speed. The reason is: time has slowed down for the guy in Machine #1; so what seems like a slow speed to us on the outside, seems like a fast speed to him.

Answer 5

It doesn't work that way. I know in our everyday classic Newtonian physical world, velocity seems like a vector quantity that can be summed to get a larger vector value. This is not the case when velocities get very fast. In fact, you cannot even get a single atom of matter to reach the speed of light, only get close. For any mass to reach the speed of light would require infinite energy.

Answer 6

Nope. They would still be travelling at the same speed. Einstein showed that when you approach the speed of light, speeds no longer add linearly like you're doing there. Look up the Lorentz equations for velocity to see how they add.

Answer 7

No. As the advert says, 'It doesn't work like that'!

Relativity is complex and counter intuitive.

for one thing, what you state is an oversimplification. Nothing can travel as fast as light in a vacuum (The speed of light can vary according to the medium)

Some thing projected from a point travelling at SOL would appear to have extra velocity only relative to the observer, it would not actually transcend the SOL.

Answer 8

Once you master this subject, you will understand the most essential concept in modern science and be well on your way to becoming a scientist. It is important to realize that in order to measure we need to come up with a frame of reference. For example, somebody invented the meter. They just arbitrarily said "this is a meter", and we judge the height of people by saying "that guy is 1.6 meters".

Scientists use the speed of light as the reference frame. Just like the length of a meter does not change once we define it, neither does the speed of light. Everything else is relative to that speed. There is no such thing as faster than the speed of light. Some things may appear to be going faster than that speed, but only relative to an observer in a particular situation. The speed of the light did not get any faster, it just appeared to get faster relative to a guy "over there."

It may take a while to wrap your mind around this. You must first define a reference frame, and then, once inside of it, stick to the rules. For example, you cannot arbitrarily say, yesterday a meter was this much, today it is this much.

Answer 9

Impossible, on two fronts.

First off, the speed of light is relative. If you are moving at .9c, or about 2.7 x 10^8 m/s, and you emit light, that light will appear to move away from you at 2.9979 x 10^8 m/s, or light speed, in any direction. However, an observer will only see it moving at c, regardless of your actual velocity.

Secondly, to reach light speed requires infinite amounts of energy for any object with mass. So you'd have to have twice the infinite amount of energy. Which is really, really hard.

Answer 10

No. They will travel with the speed of light only.

Answer 11

No. You assume too much. Think of the speed of light as a limit. You can get close to it, but never actually achieve it. Speeds are not so much absolute as they are percentages of that ultimate limit. So your machine would be going say 99.9% c, and if it launched a copy of itself, it would be going approx 99.99999% c. You would be significantly faster, but it is not as simple as adding the two velocities when you are talking velocities of that magnitude.