In the US, the law requires the driver's side mirror to be flat. This gives an accurate view of what's behind the car since the light is reflected unaltered.

All vehicles have blind spots. These are areas or zones on either side of a car that a driver cannot see when looking into the rearview or side-view mirrors. Blind spots are why a driver should always ...

To determine whether two objects have the same color, an observer would need to view the objects side by side against the same background and under various lighting conditions.