How do automatic windshield wipers know when to wipe?

Question

How do automatic windshield wipers know when to wipe?

In: 0

Answer 1

There is a sensor embedded in the windscreen.

It could be electrical (like how a phone senses that you have touched the touchscreen) or it could be optical (it senses how raindrops on the glass refract light)

The sensor then tells the wipers to activate