Which term describes electromagnetic waves that can be seen by humans?

Which term describes electromagnetic waves that can be seen by humans?

• A. Visible light
• B. Infrared light
• C. Ultraviolet light
• D. Invisible light

Answer: (A)

Humans perceive only a small slice of the electromagnetic spectrum with their eyes, called visible light. These wavelengths are roughly 400 to 700 nanometers and are the portion we see as colors from red to violet. The eye’s photoreceptors convert these wavelengths into images and color signals. Infrared light has longer wavelengths and is felt as heat rather than seen. Ultraviolet light has shorter wavelengths and is not visible to the eye, and invisible light refers to any wavelengths outside the visible range. Because visible light is the only range detectable by our vision, it’s the correct term here.

Humans perceive only a small slice of the electromagnetic spectrum with their eyes, called visible light. These wavelengths are roughly 400 to 700 nanometers and are the portion we see as colors from red to violet. The eye’s photoreceptors convert these wavelengths into images and color signals. Infrared light has longer wavelengths and is felt as heat rather than seen. Ultraviolet light has shorter wavelengths and is not visible to the eye, and invisible light refers to any wavelengths outside the visible range. Because visible light is the only range detectable by our vision, it’s the correct term here.