Question

how does googles autonomous vehicle know the distance between itself and the objects in front or behind it?
a video camera
b lidar
c radar
d google maps

Explanation:

Google's autonomous vehicles use LiDAR (Light Detection and Ranging) technology to sense distances. LiDAR emits laser light pulses that bounce off objects and return to the sensor. By measuring the time it takes for the light to return, the vehicle can calculate distances to objects in its environment.

Answer:

B. LiDAR