Quote:
Originally Posted by voiceoflg
Then how would you determine if the ball would have bounced through or not if the ball contacts the laser beam?
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There is no upright where the laser would be. Therefore, it makes no difference if it "would have bounced through or not." This is for above the upright. The laser is only to determine whether the ball is INSIDE the upright or not.
You can't extend an upright to the moon.