Theoretical particles?

Question

Are there any other theoretical particles like the graviton? I mean, this particle corresponds with gravitational force, right? So there must be similar corresponding particles for EM, strong nuclear & weak nuclear forces, right?

Sorry if this is a stupid question. I'm interested but don't have much background in this stuff.

Answer 1

This is not a stupid question at all. Theoretical particles are an extremely complicated concept to grasp. And there are other theoretical particles and also what are known as antiparticles. If you want a better understanding of these I HIGHLY reccommend reading "A Brief History of Time" by Stephen Hawking. Its an amazing book which is relatively short and its written in such a way that people with limited knowledge of physics and mathematics can understand it.

The electromagnetic force, for instance, is mediated by the photon, the basic quantum of electromagnetic radiation. The strong force is mediated by the gluon, the weak force by the W and Z particles, and gravity is thought to be mediated by the graviton.

Answer 2

The main reason for anything dealing with gravity being theoretical is that we know so little about it. By comparison, we know not only how electromagnetism works, we can generate electric power and use it to do all sorts of things. We have done some amazing and scary things with nuclear energy.
Gravity...... We know that objects with mass exert a force on other objects with mass. We can measure it's force and use that to aim projectiles and satellites. And that's about it. What really causes it? Don't know. Some people thing there is a top secret aircraft being developed on a secret base that uses anti-gravity as propulsion. Guess we'll find out one day.
As far as theoretical particles in an atom. Protons and neutrons have been smashed and you get quarks that leave little trails in a bubble chamber. So they are there. Right now as far as I know, an electron has never been broken into anything smaller.
And then you have anti-matter, which is supposed to be the opposite of protons, electrons, and neutrons.
To me, there has to be a lot we don't understand yet. I mean, how do you explain that an element has one more proton and electron than another, and is so differerent.
But hey, this is a subject that can obviously go on and on. You will get answers telling you all sorts of indecipherable stuff. So don't worry about asking stupid questions. You have to start learning somewhere. I've studied physics for a few years and for every question that gets answered, new ones pop up. Glad you are interested in this stuff. We will never run out of things to discover and it will take many more generations to make real progress on it. Keep asking questions!

Answer 3

We don't even know if there is a graviton yet. A photon is a particle for EM. As for the 2 nuclear forces, I'm not sure.

Answer 4

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Answer 5

although i have no knowledge in graitons i would advise you to study theories which have been proven like General relativity or newtonian physics before figuring out whether these particles exist.