which sensor i should use for detecting the ball

[Faiz555]

as title
i am not sure which sensor
i am using LEGO® MINDSTORMS® Education NXT Base Set for my soccer playing robot project
wanna know as soon as possible

[ChrisB01]

The best sensor for detecting a coloured ball would be an NXTCam from Mindsensors, a US based company, however there very expensive and not easy to program.

I am not sure a light sensor will be any good at finding a ball but once you have it you will be able to determine its colour if necessary.

All of that is probably not very useful. I would be tempted in your situation to invest in a roboball for Robocup football. Robocup is an international robotics competition so it might open more opportunities. You can purchase these form HiTechnic as well as a specific sensor to detect the ball.

Chris