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Why does a straw look bent in water, and why do sunsets turn orange? Learn how refraction, scattering, and diffraction explain everyday light.
May 6, 2026
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Why does a straw look bent in water, and why do sunsets turn orange? Learn how refraction, scattering, and diffraction explain everyday light.
Why do spinning tops not fall? Discover how angular momentum, torque, and precession help a spinning top stay balanced, explained in simple language.
Charles De Lisi, PhD.
Metcalf Professor of Science and Engineering
Boston University
College of Engineering
Boston, MA