For the Element of Harmony, see the appropriate section of the Elements of Harmony article. My Little Pony Friendship is Magic possesses many fantasy elements. A prominent one is the use of magic by ponies and other creatures such as changelings. Throughout the show, Earth ponies tend to crops and care for plants and animals, particularly in Winter Wrap Up, Fall Weather Friends, and Hearth's Warming Eve.
Visible light is merely a small part of the full electromagnetic spectrum, which extends from cosmic rays at the highest energies down through the middle range (gamma rays, X- rays, the ultraviolet, the visible, the infrared, and radio waves) all the way to induction-heating and electric-power-transmission frequencies at the lowest energies.
Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes. EM radiation is transmitted in waves or particles at different wavelengths and frequencies. This broad range of wavelengths is known as the electromagnetic spectrum.