The part of electromagnetic spectrum, defined as radio and microwaves, can be further divided into eight ranges, called bands. These bands are rated from very low frequency (VLF) to Extremely High frequency (EHF) Very Low Frequency :: These waves propagate as surface waves, usually through air, sometimes through water. VLF may be affected by atmospheric noise. VLF waves are usually used for long range radio navigation and submarine communication. Low Frequency :: these waves propagate…"The Parts of Electromagnetic Spectrum."
Light actually originates from the accelerated motion of electrons of atom. Atoms emit light in tiny packets of energy called photons. Photons move through space as electromagnetic waves, which are a form of energy with magnetic and electrical components. The electromagnetic waves travels at the same speed of light (c) through vacuum, no matter what their frequency the number of oscillations per second of a wave is called its frequency, f, and is measured in…"Electromagnetic Spectrum, Unguided Media of Transmission."