Ik zou het op het wel kunnen opzoeken, maar wie weet het ?

(...)Ik zou het op het wel kunnen opzoeken, maar wie weet het ?

potverdorie wat anders kan ik bedoelen. Hebben jullie soms nog nooit in een auto gereden ?

BMW has built an automatic dimmer feature into the inside and outside rearview mirrors. The inside rearview mirror has two built-in photocells, one facing forward out the front windshield and one in the mirror itself measuring potentially blinding light coming from behind. A computer then compares the intensity of the two measurements, recognizing the difference between intense ambient light (a sunny day in front and behind) and potential glare from headlights following behind at night.

Depending upon the difference in readings, the system modulates the voltage of an electric charge in the gel layer of all the rearview mirrors (inside and outside). The reflectivity of the gel layer changes with the amount of charge, thus dimming the mirror when there are headlights behind. When the source of any glare is gone, the voltage automatically readjusts.

The benefit of such an automated system is that when there's no following glare at night, the mirror is not dimmed, affording the driver a bit better rear-facing view than normal with a manually dimmed mirror. The 745Li's entire photocell system is even more complex than just described and has applications for automatic rain sensors and headlight controls, too.