Light is a form of electromagnetic wave which contains electric waves and magnetic waves which are perpendicular to each other, and the particle called photons which is a minute particle.

• Radio waves 10 ³ m

• Microwaves 10 ^-2 m

• Infrared 10 ^-5 m

• Visible light 10 ^-6 m

• Ultraviolet waves 10-8m

• X-ray 10 ^-10 m

• Gamma waves 10 ^-12 m