What is infrared radiation?
Q: What is infrared radiation?
A: Infrared radiation is a type of electromagnetic radiation that has a longer wavelength than light visible to humans and a shorter wavelength than microwaves.
Q: Where does the word "infrared" come from?
A: The word "infrared" comes from the Latin word infra, meaning "below," and the English word "red," because infrared light has a frequency below the frequency of red light.
Q: Can humans see infrared waves?
A: No, humans cannot see infrared waves as they are not visible to the eye.
Q: What is the range of near-infrared waves?
A: Near-infrared waves have a wavelength between 800 nm and 1.4 µm.
Q: What is thermal imaging mostly done with?
A: Thermal imaging is mostly done with thermal radiation waves between 8 and 15 µm.
Q: How do people sense infrared?
A: People sense infrared as heat.
Q: What is commonly used to send control signals in remote controls?
A: Most remote controls use infrared to send the control signals.
