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# what is actually quantum physics? what is relativity? who is the greatest scientist- Einstein or Maxwell?N?

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Quantum physics is the physics of very small particles. In physics, we tend to look at the smallest things (atoms) and the largest things (the universe). We don't care much about much in between.

There is a problem when we go to these extreme levels. Our traditional formula do not work anymore. Such as Kinetic Energy=1/2mv^2. As particles get faster, they gain in mass. This equation no longer works.

This gain in mass is called the relativistic effect (relativity). The gain in mass and speed is linked by the famous equation e=mc^2. Einstein predicted this effect before we could observe it in experiments.

Due to an increase in mass, the particles can never exceed the speed of light. The reason light can go this fast is because it is a photon; it has no mass.

Again, this is the reason for needing a 27km Large Hadron Collider. To get the particles to have enough energy to break the atom into its fundamental particles, they need a lot of speed. The more energy you give, the more mass they gain, Therefore you need to give them even more energy to make them go quicker which again results in a mass increase. You need an infinite amount of energy to get them to go near the speed of light.

We don't have infinite energy.

Luckily, scientists know the force required to split the atom and discover what is inside.

Our current theories can not explain mass. We think it may be caused by a higgs boson which is all of a particles mass.

We have worked out the energy it takes to try and find this. The LHC can crash particles together with energies of 3.5 TeV. which is enough to prove or disprove the higgs boson. If it doesn't exist, all of our theories are wrong.

Einstein is the better phycisist in my opinion. His equations all hold out and there are only a few minor discrepancies. For example, in one equation about black holes, if the particle is in the black hole, ie distance is zero, the force exerted is related to 1/dist. 1/0 is infinite. We know that you can not have an infinite force.

Even so, nearly all of his predictions are true.

• Sangmo
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