Green light next to iSight tells me when it's on, so what about the other light?

[Ubuntu]

It might just be there for symmetrical purposes, but I'm wondering what the 'light' to the left of the iSight in my Macbook is for. Does anyone know?

Thanks.

 

[XIII]

Its a mic.

 

[~Shard~]

Edit: Beaten by XIII.

 

[Fleetwood Mac]

I know how you feel. I tried to scrape mine off.

Then I looked at the box like I should have in the first place..... Isn't it neat how a small hole like that can allow for such a clear sound? (those of you who have used iChat)