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View Resource Beautiful Science: Ideas That Changed The World

Ideas that change the world can be few and far between, so it's nice to learn about this fine digital collection from The Huntington Library. Designed to complement the renovated Dibner Hall of the History of Science at the Library, this site peers into the world of astronomy, natural history, medicine, and light. After reading a brief overview about the exhibit, visitors should click on over to...

View Resource Microbal Reduction of Hexavalent Chromium

Berkeley Lab scientists have used the Fourier-transform infrared (FTIR) spectromicroscopy beamline at the ALS to obtain spatially resolved, time-dependent spectra that give evidence of the biogeochemical transformation of Cr6+.

View Resource Diode Laser

This resource, part of the Spectroscopy Lab Suite, illustrates the physics of a semiconductor Diode Laser. Students can create conduction and valence band energy levels and build in a bias due to impurity doping. The basic processes for light emission, including external voltage bias and level transitions are shown. The band energy levels and internal and external bias can all be adjusted to...

View Resource Spectra

Spectra is a website illustrating how astronomers use spectra to understand what stars are made of, their structures, and their evolution. The page begins with an introduction to the electromagnetic spectrum and then goes into detail about the properties of light. Then it discusses how matter both creates and destroys radiation. It goes on to interpret absorption and emission lines. The website...

View Resource Timing An X-ray Pulsar

This activity asks students to analyze both the light curve from a pulsar in the crab nebula and the Fourier Transform of the light curve. From this students must find the period of the light intensity, determine the period of rotation of the object, and realize the object is a neutron star.

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