Why are light and heat not considered matter

Answers:
Actually, light and heat are forms of electromagnetic radiation, in different energies or wavelengths. While the photons that make up light and heat have no mass, the mass multiplication that occurs from travelling at the speed of light is infinite, with the result that the photons do have a definite mass. This is a part of special relativity. It has been proven, by observing the apparent shift in position of a known star as its light travels in close proximity to the Sun.

If, therefore, photons can be bent by gravity, they must have mass, and they must be matter. In fact, the most famous equation of this is e = mc2, essentially stating that energy is mass, and mass energy.
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Relevant answers:
  • Is heat considered a type of matter?
    No. Heat is a measurement of molecular motion caused by energy.
  • Why are light and heat not matter?
    Heat & temperature is a property of matter... and not matter. Photons are unique as they are essentially a packet of energy, but without mass. And, not having mass, they are not considered matter.
  • Are light and heat matter?
    Heat is not matter but light is.
  • Is heat considered matter?
    nope. Solids, Gasses, and Liquids are considered matter.
  • Why are light and shadow not considered matter?
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