Which range defines the infrared portion of the electromagnetic spectrum?

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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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