Did Einstein say that mass can be converted into energy? read this fully to know my exact doubt?

Question

according to einstien's theory of relativitywhen a body travels at the speed of light,the mass becomes infinity ,but from where does it get the mass for it to become infinity

Answer 1

Special Relativity saids that if a body (not massless) were to reach the speed of light, it would require that all its kinetic energy (energy used for its motion) to become converted into mass. The reason that the mass of the body would become infinite is because it would require infinite amount of kinetic energy to propel a non-massless body to the speed of light, i.e. a physically impossible feat.

This means that you can only approach the speed of light, but never reach it. As you get closer to the speed, you'll find that you need to put ever more energy to get just a minuscule more increase in speed. So where are the all energy going? The energy is increasing the mass of the moving body. Of course, the more massive the body is, the more energy is required to move it.

Answer 2

I think you may be misunderstanding the theory. I found an excellent explanation of Einstein's Theory of Special Relativity at www.howstuffworks.com that may be helpful to you. Here is a partial quote from "How Special Relativity Works:"
"You should readily understand how a system with very little mass has the potential to release a phenomenal amount of energy (in E=mc^2, c^2 is an enormous number). In nuclear fission, an atom splits to form two more atoms. At the same time, a neutron is released. The sum of the new atoms' masses and the neutron's mass are less than the mass of the initial atom. Where did the missing mass go? It was released in the form of heat - kinetic energy. This energy is exactly what Einstein's E=mc^2 predicts. Another nuclear event that corresponds with Einstein's equation is fusion. Fusion occurs when lightweight atoms are subjected to extremely high temperatures. The temperatures allow the atoms to fuse together to form a heavier atom. Hydrogen fusing into helium is a typical example. What is critical is the fact that the mass of the new atom is less than the sum of the lighter atoms' masses. As with fission, the "missing" mass is released in the form of heat - kinetic energy. "
The article goes on to address a misconception about the theory that you may be considering, and could be causing your confusion. I hope this reference will help. The entire article is well written and easy to understand.

Answer 3

The increased mass comes from the energy used to accelerate it up to that speed. The theory also says that no mass can ever travel as fast as light for the very reason you mention, because it's mass would become infinite, and that would require infinite energy to accelerate. Only light, which has no mass, can travel at the speed of light, everything else is limited to speeds less than light.

Answer 4

It takes energy to make an object move faster. The energy added become part of the mass of the object.

It takes more and more energy to accelerate an object closer and closer to the speed of light. There is not enough energy in the Universe to make get an object with rest mass up to the speed of light, so we will never see an object with infinite mass.

Answer 5

Mass of object at it's velocity= [1/(1-[(velocity of object)^2 / (speed of light) ] x mass of object at rest x speed of light

Einstien came up with this formula to find our the mass of any object at any speed. The object's mass increases to infinity when the velocity of object is equals to the speed of light which gives a 1/0 which in the end results in an infinite mass.

Answer 6

You are confusing two concepts here really.

The first is that you are assuming that energy is frame invariant. In other words, everyone will get the same result for the energy of something, even if they are moving with respect to it. This is clearly false.

Take for example a 1 kg ball on a train travelling at 10 m/s. Its kinetic energy is 50 Joules (1/2mv^2) right? But if I am on the train with it it is not moving with respect to me, so its kinetic energy is 0, right?

Clearly you have to adjust for the frame when measuring energy. Now where this becomes a problem is that what we would usually do is just correct for the relative speed by adding or subtracting the speed of the train.

But at the end of the 19th century it was realised (by measurement) that everyone gets the same result for the speed of light, regardless of how they are moving. Inother words, something is very different from our everyday experience when adding velocities that get near the speed of light, because two velocities added together can never exceed the speed of light.

So imagine the engines of the train keep pumping out energy to go faster and faster - but lets only worry about the ball. As the train gets faster it is clear that not all of the energy can be going into extra speed - or eventually it would go faster than light and we could not get the observed result for the speed of light. It turns out (by doing the math) that the extra enegy becomes additional mass for the ball.

Remember that this is only for the ball as viewed by US at rest with respect to the train. For the guy on the train it still has mass 1kg.

So the first element of energy-mass equivalence is just about how you handle transformations of energy between frames that are moving with respect to each other.

The second is from quantum mechanics. The universe is made of particles (or maybe strings - thats another story) bound together. At the first level its protons, neutrons and electrons bound to form atoms. Below this its quarks to forms protons and neutrons etc.

Now the forces binding these particles together represent energy. And this energy has a mass equivalence. And it turns out that for quarks, most of the mass of the particles they make up does not come from the quarks themselves but from their energy.

Think of it like this. The quarks whizz around like the clappers bound together by a force (the strong nuclear force). So they are like the speeding mass on the train. Their very high speed is exhibited as extra mass from our frame of reference.

Answer 7

You anwered your own question. The object cannot reach the speed of light; all the energy used in trying to get there gets converted to mass instead of increasing the speed of the object.

Answer 8

replacing mass into potential is way a lot less difficult than the different. to remodel potential into mass wide temperatures and energies concentrated on one spot are needed. distinct the mass contained in the universe became created a couple of minutes after the huge bang even as the temperatures were huge. debris with mass are also created out of organic potential in particle colliders, because in straight forward words there human beings can recreate the situations that were purely after the huge bang. Edit : The mechanism is termed the Higgs mechanism from which each of the needed debris obtained their mass notwithstanding this is totally complicated.

Answer 9

U must also be knowing that that a body can never achieve the speed pf light. so the more energy u give the body to increase its velocity is converted by the body .remember,a body cannot go oon increasing its velocity just like that you(or whatever wants the body to move) must give some energy to that body in "pushing"it.So,the energy supplied to the body is only used to get mass
I hope u find this useful :D

Answer 10

From my understanding, mass can be converted into energy and energy can be converted into mass. An atomic bomb takes a lump of mass, and converts it into copious amounts of energy. Conversely, the big bang theory states that a pin-prick of energy created all the mass in the universe.