The Committee on the Rights of the Child (CRC) may receive and consider individual communications alleging violations of the Convention on the Rights of the Child and its Protocols (OPSC, OPAC) by States parties to the Optional Protocol (on a communications procedure) to the Convention on the Rights of the Child.
White light, for example, is a form of radiant energy, and its frequency forms a tiny bit of the entire electromagnetic spectrum. In the illustration above, you will see the different radiant energy levels represented by their wavelengths.
Electromagnetic radiation, or light, is a form of energy. Visible light is a narrow range of wavelengths of the electromagnetic spectrum. By measuring the wavelength or frequency of light coming from objects in the universe, we can learn something about their nature.