Lidar is a scanner or radar that scans the environment, predicts depth, and creates a 3D map of the surroundings by sending laser beams and measuring the duration in which they return to the source. This happens very quickly, though, like in nanoseconds, so that you can expect results very quickly.
Until now, the closest we get to LiDAR in consumer products is self-driving cars. This technology helps the car's brain detect if there's anything on its way, like a human being crossing the street. However, apart from some prototypes here and there, these cars are not in use yet. But as its fellow technologies like computers (remember the 80s?) and radars, finally LiDAR made its way to the everyday consumer products, like the iPad Pro and iPhone 12 Pro and Pro Max.
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