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View submission: Ask Anything Wednesday - Engineering, Mathematics, Computer Science
In a nutshell, while they both use light, radar uses waves and lidar uses beams. These beams are more expensive (in comparison) both to generate and to process on return. The components necessary to create and receive the laser beams are expensive, and much more processing power is necessary to do the math to turn the received signal into a meaningful result is significantly more than radar (which is basically just a clock and a little arithmetic)
Chances are 4D radar will replace existing radar and lidar in the coming years.
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