Our report on the physics of collapsing bubbles
(4 March, p 15)
failed to mention two researchers at the Massachusetts Institute of Technology
who played important roles in elucidating the processes involved. Sahraoui
Chaieb performed the delicate experiments which revealed the ripple pattern and
analysed the data, and L. Mahadevan led development of a comprehensive theory.
The lead author, Rava de Silveira, is a doctoral student who completed the
analysis and theoretical interpretation.
Also: In the story “Art of darkness”
(18 March, p 22) was the statement that
the speed of light in water is “220 million kilometres per second”. As several
readers have pointed out, that is several hundred times faster than light in a
vacuum. It should have been 220 million metres per second.
