Here's why:
* Convex mirrors bulge outwards. They create a smaller, wider image, making objects appear farther away than they actually are. This is great for providing a wide view of the area behind the car, but it can distort the size and distance of objects.
* Concave mirrors curve inwards. They magnify objects, making them appear larger and closer. This is helpful for seeing objects in the driver's blind spot more clearly.
While most cars have a convex mirror on the passenger side to provide a wider view, the driver's side mirror is concave to provide a clearer view of the blind spot.