You can't turn them off.
You have to slip past the Security room and the lasers in the Statue Room when you enter the museum at night. Hide behind the statues until the lasers move away, then work your way slowly to the door at the left side.
on counterfeit island in the museum when there are lasers you cant turn them off. you hide behind the statue's
then you jump on the scream and then the alarm will go off
In the main gallery, click on the painting ("The Scream") -- the alarms will go off and they will take you to jail. Answer the lie detector as truthfully as possible and you will be released.
You don't turn them off. The light shows you where the hidden picture piece is located : climb the cord in the domed section.
You go next to the museum and go to the balloon and leave.
You can't disarm them, only go by them when they are turned off. You can detect when they turn off with your laser detector goggles from the 3rd spy.
Neither the lasers or the electrified windows on Toupee Terrace can be turned off. Once you have rescued all three missing spies, you will get the ultra-vision goggles and you will see the lasers. (see related question)
First hide on the potted plant. The lasers will pass over you safely. Stand on the very right edge of the plant, so that one more click and you'd fall off. Then when the laser is completely to the left, smoothly jump and hide between the second statue. Keep hiding behind statues to hids from lasers.
To get past the lasers at Counterfeit Island, you need to carefully time your movements to avoid detection. Observe the laser patterns and move when they are off or in a position that allows you to slip by without triggering an alarm. Using items or tools available in the game, such as disguises or distractions, can also help you navigate around the lasers safely. Make sure to take your time and plan your route to ensure success.
You go to BAD HQ, which is on the furthest right side of the entire town. Now that you can see lasers, you can dodge them and see when they turn on and off.
If you mean Vermillion City, The switches to turn them off are in the Garbage cans
click on them