Is Everything in the Universe Made of Mass?

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The discussion centers on whether all forms of information, including light and radio waves, possess mass. It is noted that while photons have energy, they do not have rest mass, yet they can exhibit relativistic mass when in motion. The concept of energy density is suggested as a more fitting definition for space, emphasizing that movement does not inherently imply mass. The bending of light due to gravity is explained through General Relativity, indicating that gravity affects the curvature of spacetime rather than requiring mass. Overall, the conversation explores the complex relationship between mass, energy, and the behavior of light in the universe.
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Random question, but is it true that all information, like brain neurons (ideas), light, radio waves, etc... has a mass?

Basically if anything moves then it transfers energy and must have a mass. So the Universe is ALL mass?

Also, what would "space" be defined as in terms of mass.
 
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Photons have no mass, they have energy. Light and radio waves are photons. Just because something moves, does not mean it transfers energy. Think of a a Cosmic ray traveling through a vaccum, there is nothing to transfer its energy to.

As for space, a more appropriate term would be energy density.

I like how you are thinking about such topics and I appreciate your creativity.
 
So what are photons and cosmic rays made up of?

Also if light gets affected by gravity, it must have a mass.
Doesn't light travel for millions of miles then starts to bend because of gravity?

Thanks
 
MaNiFeST said:
So what are photons and cosmic rays made up of?

Also if light gets affected by gravity, it must have a mass.
Doesn't light travel for millions of miles then starts to bend because of gravity?

Thanks

I personally don't have much information on this topic but here is what I know;

Photons do have a Relativistic Mass when traveling with a speed greater than zero.

But when it comes to waves, they don't need a mass to be effected by the gravity, According to General Relativity of Einstein gravity is curvature in space time which means a geometrical phenomena. As it doesn't involves force, the wave won't need to have a mass.

For the best answers try writing this question in Relativity forum.
 
So I know that electrons are fundamental, there's no 'material' that makes them up, it's like talking about a colour itself rather than a car or a flower. Now protons and neutrons and quarks and whatever other stuff is there fundamentally, I want someone to kind of teach me these, I have a lot of questions that books might not give the answer in the way I understand. Thanks
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