What is the wavelength range of the visible electromagnetic spectrum for the human eye?

Correct answer: 380–700 nm. Human eyes see wavelengths of about 380 nm (violet) to 700 nm (red).

Background: Visible light is a small part of the electromagnetic spectrum.

• 100–300 nm: 100–300 nm lies in the ultraviolet range.
• 500–900 nm: 500–900 nm extends into the infrared range.
• None of these: “None of these” is incorrect because 380–700 nm is correct.

Did you know? The colours are remembered as VIBGYOR.

Memory trick: 380 to 700 nm.