A museum curator claimed a thief snuck past the laser grid by crawling underneath it. The detective knelt down, checked the floor, and immediately knew the curator was lying. There were no marks on the dusty floor, but what physical law about laser grids proved the curator wrong?
Laser grids reach all the way down to the floor.
A proper security laser grid spans from the ceiling all the way down to the floor to prevent anyone from crawling underneath or stepping over beams. You cannot simply crawl under a security laser grid.
About this riddle
Detective riddles are tiny mysteries. Look for the detail in the story that does not fit; it is usually the clue that solves the case.
Difficulty: Medium. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.
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