The visible spectrum of light, which is the range of light wavelengths that can be detected by the human eye, spans from approximately 3900 angstroms (violet) to 7600 angstroms (red). These wavelengths are part of the electromagnetic spectrum, and this range is generally recognized as the visible light range.
Thus, the correct answer is \( \boxed{3900 - 7600 \text{ angstrom}} \).