15. What is a thermograph?
a device that uses infrared sensors to create pictures that show variations in temperature
an infrared lamp used for heating purposes
a color-coded picture that shows variations in temperature
an infrared sensor used to detect problems and variations in an electrical current

Respuesta :

Answer: A device that uses infrared sensors.

Explanation:

Answer:

a device that uses infrared sensors to create pictures that show variations in temperature

Explanation:

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