Most car headlights have lines across their faces. what are these lines for?

Question

help i need answer o these questions. i dont know much about cars

Answer 1

To "project" light emitted by a headlight on the road correctly.

It prevents dazzling the oncoming traffic and concentrate the light on the road. Otherwise it would be all over the place. Compare that to a normal electric torch that projects light evenly. Modern Projector lamps have clear lens.

For more details, look at

http://en.wikipedia.org/wiki/Headlamp

http://en.wikipedia.org/wiki/Headlamp#Co...

Answer 2

if you mean the lines that make the squares on the reflector not the lens that is to aim the light coming out of the head lamp i work in a factory that makes headlamps for alot of different makes even semis the lights are aimed by the light pattern shinning in a computer controled box the old way to aim headlamps was the three bumps that are on old headlamps

Answer 3

For horizontal aiming.

Answer 4

focus the beam...

Answer 5

you know i always wondered that..... now i can find out!

Answer 6

The lines in the headlamp covers or bulb surface is to diffuse the light beams so that they project a wide effective pattern of light.