The wavelength of the visible region of the electromagnetic spectrum extends from which range?

The visible region of the electromagnetic spectrum corresponds to the range of wavelengths that the human eye can detect, falling between approximately 400 to 780 nanometers. This range includes all colors visible to humans, from violet (around 400 nm) to red (around 780 nm).

Understanding this range is vital, as it has implications in various fields such as lighting design, color theory, and biological responses to light. For example, this knowledge is crucial in safety standards where visual signals or indicators need to be within the visible spectrum for effective communication. The other ranges do not accurately represent the visible spectrum; thus, they fall outside the accepted range for human vision.