Is light, gravity, or space made of matter?

Question

???

Answer 1

Light is energy - (and according to wikipedia it is non-matter).

Gravity is a force, so it isn't matter either.

And space is the place where matter exists...

It sounds more like a philisophical question, but it's probably trying to get you to understand what matter is and isn't....?

Answer 2

None of the above.

Light is a form of energy.

Gravity is a form of energy, but we can't figure out what kind  . . .

Space is the place that matter is put in.

According to the First Law of Thermodynamics, matter is just another form of energy.  How much energy was defined by Enistein as "E=mc2" [E equals m times c-squared] when E = Total Energy, m equal mass, and c equal; the speed of light.

Answer 3

Excuse me everyone, but light is not energy; like everything else, it *has* energy. That is, energy is one of its properties. It has other properties too, like polarization and direction. Matter is generally defined as something composed of particles with rest mass. Light and gravity have no rest mass, and gravity isn't even a particle, but a property of space-time.