BEER BUBBLES at the BOTTOM?

Question

Beer or champagne in a champagne glass.

"Were does the bubble came from?"

there's no air at the bottom of my glass but were does the bubble came from?

Answer 1

Beer or champagne is bottled under pressure and is chilled before serving. When the pressure is released, the liquid can hold less dissolved gas and releases it. As the liquid warms toward room temperature, you get the same effect.

In regard to your last question, Je parle une peu de Francais, comme une vache espagnol.

Answer 2

I've been a bartender for about 10 years, and always thought this was a good question.  Here I think irabeer.com explains it best:

Bubbles in Your Beer

Beer along with soda and champagne are bubbly beverages with effervescence caused by dissolved C0². Beer is bottled under pressure or in the case of the homebrewer pressure develops as the beer is conditioned. This increases the amount of dissolved C0² in the liquid. When a bottle is opened the pressure is released and the beer moves toward a state of equilibrium (it goes flat) and bubbles form.

Molecules of C0² are dispersed evenly throughout the beer until the bottle is opened. Once the pressure is released gas molecules migrate to certain spots and coalesce to form bubbles. These spots are more likely to be on the sides or bottom of the bottle or glass. The bubbles form more easily at surface imperfections (pits, scratches or etch marks).

These sites are called "sites on nucleation". Once bubbles begin to form, they draw more C0² molecules to the site. The bubbles grow larger and soon attain enough buoyancy to break free and rise to the top. This process continues until the beer reaches equilibrium.

Pretty decent explanation, right?

A side note on "sites of nucleation".  Some beer companies,  usually the heavier, higher proof belgian ones will etch their insignia in the inside of a beer glass (I've seen it in the 'bowled' type with the stem)  This creates thousands of sites of nucleation, and brings the insignia or logo floating through the beer to the top of the glass.

NICE.

And if you're ever in a bar and you get a pint of draft beer that seems immediately flat, and has large bubbles clinging to the inside of the glass with no head, you've got a dirty glass, without a doubt.  Downright greasy is more like it.  Just a head's up.  That's an easy way to tell the bartender isn't washing the glasses like he should.----and you might get a cold or something worse.

Answer 3

release of CO2 gas when you open the bottle. more if you shake it and warm it.  

Answer 4

It's carbonation causing the bubbles; same as in any kind of soft drink.  The bubbles are carbon dioxide.

Answer 5

Carbonation.