rear view mirrors

[The Dumb One]

What happens when you flip the tab under your rear view mirror ?

..besides the fact that it blocks the glare of headlights

 

[theoak01]

thats it,it just makes it so you arent blinded

 

[The Dumb One]

i understand that

How does the tab change the tint of the mirror, mechanically i guess

 

[theoak01]

it works with reflection from the rear window

 

[The Dumb One]

my IQ must be lower than I thought

 

[HumorMe]

Here's your sign