- #26

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energy and mass are same by E=mc^2

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- Thread starter Naveen345
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- #26

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energy and mass are same by E=mc^2

- #27

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No.it does not have.One basic reason is gauge invariance.

two photons can create particle antiparticle pair.They have energy which is converted to mass.

You may have written you need energy to create mass or vice versa.

Every photon has energy,momentum,spin.Energy is simply E=h^{-}ω

is a photon a force . like gravity, magnetic fields etc. are forces create by mass ?????

- #28

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is a photon a force . like gravity, magnetic fields etc. are forces create by mass ?????

Electromagnetic (mediated by photons), strong (mediated by gluons) and weak (mediated by W and Z bosons) interactions are mediated by virtual particles. Graviton is also a hypothetical boson that mediates gravity.

- #29

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electromagnetic interaction is mediated by photons.is a photon a force . like gravity, magnetic fields etc. are forces create by mass ?????

- #30

mfb

Mentor

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No, it is just one type of energy.isn't mass the the only source of energy

Only if you use the concept of relativistic mass, which is done in ancient textbooks and bad TV documentations only.energy and mass are same by E=mc^2

- #31

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mass of electron in natural units is 0.511 Mev.Only if you use the concept of relativistic mass, which is done in ancient textbooks and bad TV documentations only.

- #32

mfb

Mentor

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c=1 is a conventional choice, but this does not mean that my height is some nanometers.

- #33

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that is just a conventional way.To get back to original requires some work.And what you don't see.

- #34

K^2

Science Advisor

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You are missing the point. E=mc² is wrong. The correct formula is E² = p²c² + (mc²)²

- #35

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if you don't use the definition of relativistic mass then,right.Otherwise both are same.Energy is time component of four momentum and mass is invariant,so they are really different. if one avoids the notion of relativistic mass which is already abandoned then of course it is wrong.But that is just not what I say.It is a matter of definition.You are missing the point. E=mc² is wrong. The correct formula is E² = p²c² + (mc²)²

- #36

K^2

Science Advisor

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Mass, without qualifier, is assumed to be invariant mass. If you want to talk about relativistic mass, you should qualify that for clarity. Were you to reply that, "Energy is equivalent to relativistic mass," there would be no complaint.

- #37

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Oh,sorry for that.

Mass, without qualifier, is assumed to be invariant mass. If you want to talk about relativistic mass, you should qualify that for clarity. Were you to reply that, "Energy is equivalent to relativistic mass," there would be no complaint.

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