The answer is visible light. Visible light is light that can be seen with a naked eye
visible light
That is called visible light.That is called visible light.That is called visible light.That is called visible light.
That is called visible light.That is called visible light.That is called visible light.That is called visible light.
Ultraviolet
A mixture of all the visible frequencies.
Electromagnetic waves (same as visible light).
visible light
visible light is the only VISIBLE light.
Optical signals (usually on the infrared band) optical s ignals generally mean visible light... so it mainly uses visible light.
visible light, infrared rays, and microwaves
radio waves, microwaves, infared, visible light, UV light, x rays, gamma rays