How and why convex mirrors are used as vigilance mirrors in departmental stores?

Convex mirrors are used as vigilance mirrors in departmental stores because they provide a wide field of view, allowing security personnel to monitor large areas with a single glance. Their curved surface enables them to reflect light from a broader angle, which helps in spotting potential shoplifters or suspicious activities. Additionally, the images reflected in convex mirrors appear smaller and more distant, making it easier to see more of the store environment. This enhances safety and security for both customers and staff.