what are the uses of infrared light
The most common use of infrared in everyday life is remote controls. These work by sending pulses of infrared that spell out a message to an electronic device. This device could be a television, blu-ray player, or even a computer.
The emitter sends out infrared light, and then the detector records the picture. You can think of the process kind of like using the flash on a camera. When you take a picture the flash lights up the object in focus, and makes the image brighter in the photograph.