Issues
Readers’ Forum
Search and Discovery
New clues to LEDs’ efficiency droop
Electrons spewed from the surface of an LED implicate Auger recombination—but not everyone is convinced.
Extreme binary pulsar shows no deviation from general relativity
A previously unexplored regime of massive neutron stars and fast companions disappoints anticipations of new gravity physics.
Issues and Events
Arctic center offers extreme hands-on education
From petrology to paleontology to physics, research at the world’s northernmost education institute involves the Arctic and much, if not all of it, bears on climate change.
Chips may replace corn for harvesting solar fuels
Researchers hunt for appropriate semiconductors and molecules to power self-contained systems that can improve on photosynthesis.
Cost increases at fusion project going critical
US domestic program braces for budget cut as senators seek schedule for completion and cost of ITER.
Business emphasis at research council has Canada’s scientists concerned
In bolstering industry, the NRC aims for innovation and economic gain. Will isolation from research developments also result?
Articles
Supercontinuum light
When coupled into an optical waveguide, the familiar narrowband radiation from a laser can become spectrally broadened into the ultimate white light.
Reinventing physics for life-sciences majors
An introductory physics course that meets the needs of biology students must recognize that the two disciplines see the world differently.
Optical multidimensional coherent spectroscopy
Techniques developed decades ago for nuclear magnetic resonance and now adapted for the IR, visible, and UV regions of the spectrum are enabling new insights into chemical kinetics and solid-state physics.
Books
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Obituaries
Frank Bethune McDonald
Robert Coleman Richardson
Quick Study
Exoplanet atmospheres
Twenty years ago planets orbiting faraway stars were the stuff of science fiction. Now their atmospheric composition and even their weather are being revealed by sensitive spectral measurements.