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The answer is no.

Now the question:The moon is now orbiting the giant mirrorbox with the earths in it. But what happens to the moon when the earths anihilate each other inside the box?

The moon remains in orbit of the box because the box still has mass (both inertial and gravitational mass)

Does 'energy' have mass?

Ok I'd agree. But what is 'generating' the mass?

Individual photons dont have mass, thats what I've been told.

So alot of photons would still not have mass right?

The answer is no. But consider this:

Electron, according to Standard Model, has mass. Small, but still.

Photons are energy,

Thats what I dont understand. Photons dont have mass. But they have energy. But energy IS mass (E=mc2).

So they have mass.

Electron, according to Standard Model, has mass. Small, but still.So the same Positron.When Electron will hit Positron they will emit photons.Conclusion must be simple- photons also must have mass.

Otherwise conservation of energy and conservation of mass we would have to consider as incorrect.

When Electron will hit Positron they will emit photons.

Maybe Lightarrow, but a photon definitely is a energy to me. In fact it is the closest thing I know to a classically, spatially localized, energy in its outcome (when measured). It has no size, no rest mass, it only consist of a momentum/energy.

Light has no rest mass, but it has momentum. Momentum is what generates gravity.

If you put a kilogram of matter and one of antimatter into an impregnable box (like a Schrödinger cat box) and they annihilate each other, the gravitational mass of the box will not change, even if it's only full of light.

Light has no rest mass, but it has momentum. Momentum is what generates gravity. If you put a kilogram of matter and one of antimatter into an impregnable box (like a Schrödinger cat box) and they annihilate each other, the gravitational mass of the box will not change, even if it's only full of light.

You're forgetting the relationship E = mc^{2} which means that whatever has inertial energy E has inertial mass m and what has inertial mass m has inertial energy E.

And with this do you think to have proved that a photon (which has an energy E) warps spacetime?

I'm going to say this one more time and only one more time - Please stop confusing the fact of whether a photon has mass or not.

Quote from: lightarrowAnd with this do you think to have proved that a photon (which has an energy E) warps spacetime?Since I've just spent an inordinate amout of time in another thread where all I did was to post proofs and you to claim they weren't correct. Homey don't play that game no more. This time around please just state whether it will or won't and what it means to warp spacetime and what that has to do with the subject at hand.

Then I might respond. Then answer me this. If a pulse of light could generate a gravitational field could a photon?

The reason I ask is because there is no well accepted theory of quantum gravity, hence the reason I never bothered to learn any of it. Since a photon is a quantum particle one needs quantum gravity to properly answer it.

Instead let's talk about a pulse of light of energy E and momentum p and thus has a proper mass of zero.Tell me lightarrow - Does it generate a gravitational field? If yes, then why. If no, then why not?

Maybe?Are you defining a single photon/lightquanta as having a spectrum Lightarrow?

That should be from a wave perspective if so, right? As you say it has what we call Spin/polarization but thinking of it, all of those definitions come from treating photons as waves, don't they?

You made me think, and wonder, some more there Lightarrow ...sorry, you cannot view external links. To see them, please REGISTER or LOGIN