Context: Infrared is used in night vision equipment when there is insufficient visible light to see. Night vision devices operate through a process involving the conversion of ambient light photons into electrons that are then amplified by a chemical and electrical process and then converted back into visible light. Infrared light sources can be used to augment the available ambient light for conversion by night vision devices, increasing in-the-dark visibility without actually using a visible light source.

Question: What sort of equipment uses the infrared spectrum in the absence of sufficient visible light?
Answer: night vision

Question: What do night vision devices convert ambient light photons into?
Answer: electrons

Question: Along with a chemical process, what type of process is used by night vision devices to convert infrared into visible light?
Answer: electrical

Question: What equipment uses the infrared spectrum with visible light?
Answer: Unanswerable

Question: What do night vision devices convert electrons into?
Answer: Unanswerable

Question: By what process do night vision devices convert infrared into photons?
Answer: Unanswerable

Question: What process uses a chemical source to augment ambient light?
Answer: Unanswerable

Question: What does a visible light source increase for a night vision device?
Answer: Unanswerable