E = mc2
We call that ionizing radiation.
Electromagnetic radiation can travel through a vacuum (like the vacuum of space), while conduction and convection require matter to do their thing.
Sound, as this is a compression wave through a fluid (liquid or gas) or solid material. The electromagnetic spectrum finds a vacuum no trouble at all. cw: Vacuums prevent convection and conduction but do not prevent radiation.
None of these. It is energy. It is not matter. But according to the law of relativity, energy can be converted into matter.
Energy comes in different forms; it would help to know what type of energy you are talking about. Energy that can move around includes mechanical waves (for example, waves in water), sound waves, light and other electromagnetic radiation.
Radiation, or electromagnetic waves do not require matter to carry energy.
We call that ionizing radiation.
Electromagnetic Radiation
Now, this question has two answers. To give rise to, and to absorb, thermal radiation, matter is needed. Energy in the form of gravitational or electromagnetic fields neither emits nor absorbs thermal radiation. However, thermal radiation, an electromagnetic wave, does not need matter to transverse space.
No. Radiation transfers energy by the propagation of waves within the electromagnetic spectrum and the travel of photons (wave-particle duality). No matter is moved in this process.
No. Radiation transfers energy by the propagation of waves within the electromagnetic spectrum and the travel of photons (wave-particle duality). No matter is moved in this process.
Dark Matter
Electromagnetic radiation can travel through a vacuum (like the vacuum of space), while conduction and convection require matter to do their thing.
Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.
Do you mean "matter or energy"?. Strictly not, in the sense that it never disappears. Matter can be thought of as condensed energy, via Einstein's E=mc2. Even if you "destroy" matter (mass) in a nuclear explosion, it is really converted into sound, heat and radiation, and some of the radiation may leave this planet. But it isn't destroyed.
Energy can be transferred when no matter is present by electromagnetic radiation, such as light or radio waves. However, the actual energy is matter, because matter and energy are convertible, simply different forms of each other, using Einstein's famous equation e = mc2.
Dark Matter