What kind of waves does the IR Sensor work on?(a) Infrared(b) Indigo(c) Ultrasonic(d) InfrasonicI had been asked this question in a national level competition.My question comes from IR Sensor topic in section Interfacing of Sensors, Actuators, and Other Modules of Arduino

What kind of waves does the IR Sensor work on?(a) Infrared(b) Indigo(c

1.	What kind of waves does the IR Sensor work on?(a) Infrared(b) Indigo(c) Ultrasonic(d) InfrasonicI had been asked this question in a national level competition.My question comes from IR Sensor topic in section Interfacing of Sensors, Actuators, and Other Modules of Arduino
Answer» Right CHOICE is (a) Infrared To explain: The IR Sensor works on Infrared waves. These waves have a LONGER wavelength than visible light and are a form of electromagnetic RADIATION. Usually Infrared can be felt as heat when incident on humans, but the sensor’s intensity is too SMALL to be felt usually.

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