Question

why do police car and bike has red and blue colour lights?​

Answer 1

Explanation:

The combination of red and blue is often used because red is more visible during the day, while blue is more visible at night, among other reasons. Flashing amber in the rear has been shown to be more effective at preventing collisions with the patrol car than flashing red or blue.

Answer 2

Answer:

Over time, police cars and other emergency vehicles began to use flashing emergency lights. They also began to add another color: blue. ... Using a combination of flashing red and blue lights thus helps to alert drivers regardless of the time of day

hope it is helpful to you please follow give brainliest answer