The electromagnetic spectrum range that includes wavelengths just beyond visible red is which type of light?

• A. Infrared light
• B. Ultraviolet light
• C. Visible light
• D. Gamma rays

Answer: (A)

Wavelengths just beyond visible red fall into infrared light. Infrared has longer wavelengths than the red end of the visible spectrum, so humans don’t see it but we can feel it as heat. Ultraviolet has shorter wavelengths than visible light, gamma rays are much shorter and highly energetic, and visible light is the range we can see. So infrared is the correct choice because it sits beyond red in the spectrum.