For safety reasons, external locked doors on commercial buildings have mechanisms for people on the inside to escape without using a key or combination. One common mechanism uses an infrared motion detector to open an electronic lock for people moving towards a door from the inside. Explain how an air gap under such an external door could be exploited to open that door from the outside?
What will be an ideal response?
Use a large warm metal sheet. Slide the sheet under the door and move it
around to trigger the motion detector and unlock the door.
Computer Science & Information Technology
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