Why is it called a Let

i know it's let but in my country i never heard let but what the umpire said is net
maybe the let mean he let you do to the serve again... maybe ?

this answer applies to tennis but I assume same origin

http://answers.yahoo.com/question/index?qid=20070816223510AASLxze

Please answer my question faster please because I all most have ping pong torment 

I can answer the question.  It is based on tennis.  When the served ball first hits the net it is a "net", meaning the receiver does not have to attempt to hit the ball.  If the ball lands on the table, it is a "net" and the serve is played over.  If the ball doesn't hit the table, it is a "fault" and the server loses the point.  So the call should be net when it hits the net and "let" if it lands on the table, or a "fault" if it does not.  In tennis there are usually two distinct calls, a "net" when the ball hits the net, then a" let" or a" fault" based on where the ball lands.

Of course in table tennis by the time a serve is called it may have already done both.

I hope this helps.

Phil

Thnx for the answers. Though it doesnt make sense to use let instead of net in serving...