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Are there any ways to pass through a laser sensor without being detected?

The sensor is triggered when the LASER beam is obstructed.

If you sense the presence of Laser beam and avoid it, you can do that. If any of the many laser beams are obstructed, it will trigger the alarm.

You can also imagine replacing the LASER beams at exact positions with your own set of beams instantly when they are obstructed with your own laser of same kind frequency and intensity (which is not easily possible)

 

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