my question was after bowler bowled the ball immediately how they show the speed is there any sensor in the ball or what was the system used
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Radar guns measure the speed of a cricket ball in much the same way as they measure the speed of a moving car. A radar gun includes both a radio transmitter and a receiver. It sends out a concentrated radio wave which is reflected off any object in its path — in this case the cricket ball. The gun receives this “echo” and uses the Doppler shift principle to calculate the speed of the moving object.
Hawk Eye technology also measures the speed of a cricket ball as it is bowled. Using technology originally created for missile tracking and brain surgery, Hawk Eye takes data from six cameras. It uses this data to track the path of the ball from the time it leaves the bowler’s hand to the time it goes dead, and presents this information as a three-dimensional image.
Source(s): http://www.ehow.com/facts_6950464_bowling-speed-me…
http://answers.yahoo.com/question/index?qid=2905…
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With a Platypus of course
Source(s): http://www.gizmag.com/the-cricket-ball-that-measur…
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