1)Light is a kind of electromagnetic radiation.
3)Electromagnetic radiation has no mass.
4)Electromagnetic radiation can travel through a vacuum.
Electromagnetic waves are waves that can travel through vacuum. that is they do not require material medium for propagation.
Light is in the electromagnetic spectrum.
Electromagnetic waves can travel through a long distance. For instance, radio waves are electromagnetic radiations that travel long distances.
Electromagnetic radiations carry energy with it but no mass.
Some of the electromagnetic radiations are visible such as visible light.