Question

a device that measures how fast the ball travels after it
leaves the bowler's hand ​

Answer 1

Answer:

Radar guns seek a reading in the area between the point the ball leaves the bowler's hand and strikes the pitch, where the ball is travelling fastest.

Answer 2

hey here is ur Ans

The Speedsensor measures speed by measuring the time between the bowler’s hand and when it hits something (the pitch or the nets, or that all-purpose, readily-available wicket, the trash can.