Bathtubs are splendid places for studying physics! Recently I was happily splashing about and noticed that the light from the lamp above me was being focused as bright spots on the bottom of the tub. Closer inspection showed that the spots were surrounded by dark rings. This pattern turned out to be due to the lensing effect of bubbles floating on the surface of the water.

Topics
Elastic modulus, Stress strain relations, Geometrical optics, Lenses, Education, Teaching, Books, Governing committees, Lectures, Physicists
1.
Thomas B.
 
Greenslade
 Jr., “
A modification of Young's harmonic sliders
,”
Phys. Teach.
 
39
,
234
(
April 2001
).
https://doi.org/10.1119/1.1367795
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© 2012 American Association of Physics Teachers.
2012
American Association of Physics Teachers
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