Visible light corresponds to which wavelength range?

Visible light corresponds to which wavelength range?

• A. <400 nm
• B. 400-700nm Wavelength
• C. >700 nm
• D. 1-2 µm

Answer: (B)

The concept being tested is which wavelength range humans can see. Visible light is the portion of the electromagnetic spectrum that lies between ultraviolet (shorter wavelengths) and infrared (longer wavelengths). Our eyes are sensitive roughly from 400 to 700 nanometers, with violet near the lower end and red near the upper end. Therefore, the visible range is about 400–700 nm. Wavelengths shorter than 400 nm are ultraviolet and not visible, while wavelengths longer than 700 nm are infrared and also not visible. The option describing 1–2 micrometers corresponds to infrared, not visible light.

The concept being tested is which wavelength range humans can see. Visible light is the portion of the electromagnetic spectrum that lies between ultraviolet (shorter wavelengths) and infrared (longer wavelengths). Our eyes are sensitive roughly from 400 to 700 nanometers, with violet near the lower end and red near the upper end. Therefore, the visible range is about 400–700 nm. Wavelengths shorter than 400 nm are ultraviolet and not visible, while wavelengths longer than 700 nm are infrared and also not visible. The option describing 1–2 micrometers corresponds to infrared, not visible light.