Which range defines the infrared portion of the electromagnetic spectrum?

Prepare for the Unmanned Aircraft System (UAS) Exam with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Get ready to ace your exam!

Multiple Choice

Which range defines the infrared portion of the electromagnetic spectrum?

Explanation:
Infrared light is the portion of the spectrum with wavelengths longer than visible red light. It starts around 700 nanometers and extends up to about 1 millimeter. This places infrared just beyond the visible range, which is why IR is used for things like heat sensing and night vision. The other ranges don’t fit: 400–700 nm is visible light, 1–3 cm corresponds to microwaves, and 1–10 nm lies in the X-ray region.

Infrared light is the portion of the spectrum with wavelengths longer than visible red light. It starts around 700 nanometers and extends up to about 1 millimeter. This places infrared just beyond the visible range, which is why IR is used for things like heat sensing and night vision. The other ranges don’t fit: 400–700 nm is visible light, 1–3 cm corresponds to microwaves, and 1–10 nm lies in the X-ray region.

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