Question

a substance has no mass can we consider it as matter ?​

Answer 1

a substance with no cannot be a substance.everything in universe have mass and anything with zero mass is nothing.

Answer 2

We cannot consider a massless substance as a matter.

We cannot consider a massless substance as a matter.This is because the definition of matter states that a substance which has mass and can occupy some volume must be considered as matter.

We cannot consider a massless substance as a matter.This is because the definition of matter states that a substance which has mass and can occupy some volume must be considered as matter.If a substance does not have either mass or volume or both of them, then we cannot consider it as matter. Like air is a matter as it occupies both mass and volume whereas sound waves are not matter as they do not have either mass or volume.