Scottish scientists claim to have video evidence which proves that bubbles
in a glass of beer can move downwards.
Working in association with colleagues in California, the Edinburgh
University researchers used a high-speed digital camera to record the movement.
Until now, some had claimed that the effect was an optical illusion.
The scientists released their evidence to coincide with St Patrick's
Day, claiming that the effect is clearest in Irish stout.
Although generations of beer drinkers had reported seeing bubbles sink
to the bottom of their glass, scientists had struggled to prove that it could
really happen.
[snip]
Dr Andrew Alexander of Edinburgh University's School of Chemistry said: "We
had known for some time about the question of Guinness bubbles defying the norm.
"Our group carried out preliminary experiments at a local pub a few years
ago, but the results proved inconclusive.
"But now we have produced video proof that the bubbles do actually go
down the inside of the glass."
Although an undisclosed quantity of beer was used in the laboratory
experiments, the researchers insist that it was poured away afterwards to
prevent their judgement becoming clouded.
Beer science marches on.
No comments:
Post a Comment