Light is made up of light waves, which are different than normal waves because they do not need a medium, or a material to travel though. (Some examples of mediums are water, air, wood, metal...)....
light is frequency as our eyes detect the frequency spectrum of colors white is the brightest that we can see. Of course black is just the absence of light
No, all light is the same no matter if it is artificial or natural. and light is an energy, like heat. light has no mass or volume and you cannot touch it like you can touch solids/liquids/gases.