Light is electromagnetic radiation that falls within the visible part of the electromagnetic spectrum. Light travels as a series of transverse waves and does not require a medium for its propagation. More » Science Physics Electricity

The basic properties of light are its wavelength, frequency, energy and speed. Light is composed of energy particles called photons and can behave as either a wave or as separate particles. More » Science Physics Optics & Waves

Helium is a gas that is colorless, odorless and does not react with other elements under normal circumstances. Scientists classify helium as a noble gas. More » Science Chemistry Atoms & Molecules
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Some properties of radio waves, which are a type of electromagnetic radiation, are that they have the longest wavelengths and the shortest frequencies on the electromagnetic spectrum, The wavelengths of radio waves are g... More » Science Physics Optics & Waves

Ultraviolet light is a part of the electromagnetic spectrum that humans cannot see. It is composed of shorter wave lengths than visible light and lies beyond the blue end of the visible spectrum. More » Science Physics Optics & Waves

The electromagnetic spectrum describes the full range of the wavelengths of light. It encompasses the full range of light in the universe, most of which is invisible to the naked eye. More » Science Physics Electricity

According to the Encyclopedia Britannica, in terms of classical theory, electromagnetic radiation refers to energy that flows at the universal speed of light via free space or a material medium in the form of electric an... More » Science Physics Electricity