The type of electromagnetic radiation that is visible to humans is visible light. This is a small portion of the entire electromagnetic spectrum, which includes various types of radiation with different wavelengths and frequencies.
Visible light has wavelengths ranging from approximately 380 nm (nanometers) to 750 nm. The colors of visible light, from shortest to longest wavelength, are violet, indigo, blue, green, yellow, orange, and red. Each color corresponds to a specific wavelength within this range.