Top Answer
User Avatar
Wiki User
Answered 2005-03-16 00:09:03

Many newer cars have automatic windshield wipers. These work with a rain sensor, usually mounted near the rear view mirror. The sensor uses infrared light to sense moisture- droplets scatter light, and the when enough light is scattered, the sensor decides that it's raining. It then signals for the wipers to come on. Dirt can also fool the sensor into turning the wipers on.

User Avatar

Your Answer


Still have questions?

Related Questions

What is unique about Puerto Rico in the Caribbean?

it is very humid and rains a lot but when it rains it is not cold it is actually warm and it rains for like about 10 minutes then stops and goes back to being sunny and normal

There Will Come Soft Rains supporting character?

human being and house

How do plants in the desert live without water?

They store water when it rains, inside of them

Why does your radio and lights come on when it rains without the key being in the ignition?

This is extremely strange and may not have anything to do with the rain. There could be a short in the wiring system that is triggered by the atmospheric pressure in the air.

How do you enable the automatic screen wipers on the Renault scenic?

leave the wiper stalk/control set down one stop from off when you switch off the engine, it will then work automatically when it rains and the engine is running

What is being done to prevent the weathering of Stonehenge?

Stonehenge is being weathered by acid rain. Acid rain is pollution that is mixed with the air. When it rains the pollution rains down causing damage over time to structures and plants and animals.

Your 1994 cavalier has trouble starting in or after it rains any thoughts besides drive it off the bridge?

My cav. was doing this and it turned out to be plugs and wires.

What if it rains?

If it rains, then it rains. If it rains, things on the street will get wet and anything not protected from the rain will get soaked or wet.

Does it thunder and lighting every time it rains?

No. It is very common for rain to occur without thunder or lightning.

What happens when the jungle rains?

it rains

Who is the antagonist in there will come soft rains?

the rains

When was For When It Rains created?

For When It Rains was created in 1994.

What is a counterexample for when it rains it pours?

when it rains it snows

Do you fertilizer you lawn before or after it rains?

after it rains

What part of speech is rains?

Rains is a verb, the third person singular conjugation of rain. "It rains every afternoon."Rains can also be a plural noun, the rains, which indicates heavy rainfall or the season of heavy rainfall.

Who is Claude of Casablanca?

Claude Rains Claude Rains

Does it have to be cold when it rains?

No. Temperature doesn't effect if it rains or not

How tall is Dominic Rains?

Dominic Rains is 6'.

How tall is Luce Rains?

Luce Rains is 6'.

What is the verb form of Rains?

rain rains rained raining Rains is the third person singular form of rain

How does a Barrel Cactus conserve water?

When it rains or there is a flood it spreads out its roots and absorbs as much water as possible without bursting.

Does it rain in the deserts?

Yes, it rains in all deserts. However, some may go for hundreds of years without a drop.

Do eagles fly above the clouds when it rains?

no,eagles do not fly above the clouds as there is a risk of being hit by the lightening.

How do you spell It rains in Spanish?

Llueve means It Rains in Spanish.

Why does it get warmer before it rains?

it doesnt, it gets warmer after it rains