Hefty surface with more edges reflects the light from head lights in many angles
Headlights which use soft edged boxes focus light in one direction only | Hefty surface with more edges reflects the light from head lights in many angles
We know that headlights of a car are used to show the way in darkness. For a long time, these lights were arranged in a parabolic shaped box with soft edges and sides. So that, when light glows, light rays hit soft edges and undergo total internal reflection and they tend to go forward only. This facilitates more intensity of light to get focused on forward path only. But there is a drawback in this case. Light will get focused on the path in front of vehicle in the shape of those headlight boxes and so it cannot cover the areas surrounding the path. Later, using Halogen technique, manufacturing of lights with high intensity has started. In these lights, materials used as walls for reflection purpose are also changed. Soft edges are replaced by hefty surface with many more edges. When light hits the wall of many edges, it undergoes reflection in various angles. Then the driver of the vehicle can see surrounding areas along with the road. Moreover light with much intensity doesn’t fall on drivers coming in opposite direction.