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Luminescent paint makes LiFi networks more secure

Phosphorescent surfaces could even transmit after light source switched off

Ultrasound imaging from a single large sensor

New technique could leader to faster, smaller and cheaper imagers

Electric eel inspires new power source

Device could run medical implants

CERN-MEDICIS produces first medical isotopes

New Geneva-based facility makes terbium-155 for research use

Space debris threat to geosynchronous satellites has been drastically underestimated

Collisions could occur much more often – and at higher velocities – than previously assumed

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White papers

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Single molecule spectroscopy using tunable lasers

Research from the Max Planck Institute for the Science of Light in Erlangen, Germany. A white paper from HÜBNER Photonics 

Tunable lasers at work with trapped ions

Research from the AMO research group at the University of Freiburg, Germany. A white paper from HÜBNER Photonics 

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Watch the video, Introduction to Virtual NanoLab as GUI for VASP

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A puzzling neutrino detector, the best way to crumple cans

Excerpts from the Red Folder

Physics World’s shortlist for Book of the Year 2017

Our picks for top physics books of the year



Book of the Year 2017

Podcast We discuss the themes and trends that surround some of the best popular-physics books of 2017, before announcing the winner of our annual book award



A salty safety solution

Johan Wåhlin and Alex Klein-Paste explain why millions of tonnes of salt are spread on icy roads every year in the pursuit of safe driving conditions


When cold warms faster than hot

Jennifer Ouellette explores the controversially counterintuitive phenomenon of hot water freezing faster than cold – and why some scientists think a reverse effect may even occur too



Opening up the physics closet

Michael Falk calls on physicists to create a better environment for minorities


What philosophers do

Robert P Crease explains what philosophers of physics get up to



What makes a mathematician

Margaret Harris enjoys the diverse collection of top mathematical geniuses profiled in Significant Figures by Ian Stewart


How to build a planet

The Planet Factory by Elizabeth Tasker offers a “thorough guide to how exoplanets are opening our eyes to the cosmic possibilities for life”, finds Louisa Preston


A little learning is a dangerous thing

“Buy this book. And read it. Regularly.” That’s the powerful summary by Philip Moriarty of The Death of Expertise by Tom Nichols

Innovation & industry

Focus issue

Physics World Focus on Neutron Science

Free to read Understanding lightning strikes, how industry exploits neutrons, balancing security and accessibility

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