Question

light and sound are not matter why

Answer 1

Hey friend,
We know that
Anything which have mass and occupy space is called matter.

Also, particles of light don't have mass and sound is nothing but just a vibration through a medium. That's why they can't be called as matter.

Hope this helps!!!

Thanks...
☺☺

Answer 2

Definition of Matter stats anything which have maas and occupy space is matter.
Here Light and sound have neither maas nor it occupy space so it is not a matter.