Which type of electromagnetic radiation is primarily emitted by the human body?

• A. X-rays
• B. Visible light
• C. Infrared light
• D. Ultraviolet light

Answer: (C)

Verified step by step guidance

1. Understand that the human body emits electromagnetic radiation as a result of its temperature, which is typically around 37°C (98.6°F). This emission is due to thermal radiation.
2. Recall that the type of electromagnetic radiation emitted by an object depends on its temperature, as described by Planck's law and the blackbody radiation spectrum.
3. Recognize that objects at human body temperature primarily emit radiation in the infrared region of the electromagnetic spectrum. Infrared radiation has longer wavelengths than visible light and is associated with heat emission.
4. Compare the options provided: X-rays, visible light, infrared light, and ultraviolet light. X-rays and ultraviolet light are emitted by much hotter objects, while visible light is emitted by objects at higher temperatures than the human body.
5. Conclude that the correct type of electromagnetic radiation primarily emitted by the human body is infrared light, as it corresponds to the thermal radiation emitted at typical body temperatures.