Which statement differentiates thermography from night vision equipment?

• A. Night Vision uses visible low light; IR does not.
• B. Night Vision uses infrared energy to create an image.
• C. Thermography relies on visible light.
• D. Thermography produces images in real color.

Answer: (A)

Thermography and night vision differ in the part of the spectrum they rely on. Thermography detects infrared radiation emitted by objects, which corresponds to their temperature, and it creates images based on heat differences. Night vision, on the other hand, works by amplifying ambient visible light in low-light conditions to form an image. So the statement that night vision uses visible low light while infrared energy isn’t used by night vision captures the key difference: thermography deals with infrared heat radiation, not visible light. The other ideas don’t fit because thermography does not depend on visible light, and thermography images are usually color-coded by temperature rather than showing real colors.