ISSUE 34 - December 2025

Cav
M a g

Shining light

CosmoCube
New light on the Universe's Dark Ages

ALSO INSIDE

Interview
The 10th Cavendish Professor

The Moon as visible from Earth's orbit

ISSUE 34 - December 2025

Cav
M a g

Shining light

CosmoCube
New light on the Universe's Dark Ages

The Moon as visible from Earth's orbit

Welcome
to CavMag 34

Hello from the Student Editors

This special issue of CavMag represents something new, as we, a group of postgraduate students, step into the editorial role to shape this edition. For us, this has been a chance to see the Cavendish from a fresh angle: not only as a place of research, but as a living community of ideas, people, and shared curiosity. We hope this issue reflects the vibrancy, imagination, and sense of discovery that make the Department of Physics what it is today.

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Working on CavMag has reminded us how deeply the Cavendish story is intertwined with both history and innovation. Across its generations, the Department has been renewed time and again by new instruments, new buildings, and above all, new minds. Editing this magazine has been our way of joining that tradition, offering our perspective as the next generation of physicists.

It is therefore especially meaningful that this issue coincides with another moment of renewal for the Department: the arrival of Nicola Marzari, who only recently took up the Cavendish Professorship of Physics. His appointment continues a lineage that stretches back to James Clerk Maxwell, through Lord Rayleigh, J. J. Thomson, Ernest Rutherford, and Nevill Mott, to Richard Friend, and now opens a new chapter in the Laboratory’s story. In our interview, Professor Marzari reflects on this legacy and looks ahead to the possibilities of computational and theoretical physics, from understanding complex materials to harnessing artificial intelligence as a tool for discovery. He also speaks movingly about the human side of science: mentorship, creativity, and responsibility in a world where physics touches every aspect of life.

This issue, like the Cavendish itself, brings together many ways of seeing. From reflections on our scientific past to cutting-edge experiments, and from nanoscale droplets to cosmic radio waves, each article reveals how curiosity connects us across scales and generations. The outreach feature highlights recent work with pre-university students, which has grown since some of us attended these events as school students! Finally, the results of the latest photography competition remind us that wonder can be captured as much through a lens as through a formula.

Editing this edition has been both a privilege and an education. We are grateful to Harry Cliff, Vanessa Bismuth and the Cavendish Communications team for their guidance, and to the researchers and alumni whose works fill these pages.

As always, we are delighted to hear from you, so please do contact us using the details opposite with your comments or suggestions. We hope you enjoy this special edition of CavMag as much as we enjoyed creating it.


The Student Editors - Daniel Robins, Bofeng Xue, Minglei Zhang
  • Daniel is a second-year PhD student in the Astrophysics (radio cosmology) group. He works on constructing radio maps using the REACH telescope.
  • Bofeng is a second-year PhD student in the Optoelectronics group. His research interests focus on developing ultrafast spectroscopy and microscopy to unravel charge carrier dynamics and transport mechanisms in novel semiconductor materials.
  • Minglei is a third-year PhD student in the Molecular Engineering group. Her research is to design materials with desirable mechanical properties using data-driven methods.


Features

The Moon as visible from Earth's orbit

Shining light

Cavendish astronomers are turning their ground-based expertise towards a mission to the far side of the Moon. The goal: understanding the cosmos from before the stars were born.

Bouncing droplets

Microscopic water droplets rebound off surfaces only in a narrow “just-right” speed range, a finding which has real-world implications from inkjet printers and crop sprays to the behaviour of virus-carrying aerosols.

Solar panels

Solar breakthrough

Cavendish physicists in collaboration with Yusuf Hamied Department of Chemistry discovered a new mechanism using a single organic material for light harvesting, which could redefine the future of solar energy, and lead to lighter, cheaper, and simpler solar panels.

Nicola Marzari

Interview: Nicola Marzari

The tenth Cavendish professor, Nicola Marzari, talks to CavMag about bridge computation, curiosity, and the human side of physics.

Torsion-Driven Plectoneme Formation.

Twists in the flow

Cambridge-led physicists show that voltage-driven torque spins DNA into supercoils (plectonemes), not just knots – reshaping how we interpret “tangled” nanopore signals.

Dialogo di Galileo Galilei Linceo cover illustration

A tactile history of science

Physics is communicated in many forms, but perhaps the most enduring is the printed book. For centuries, physicists have filled their shelves with volumes both weird and wonderful, and the bindings, annotations and doodles within those volumes record the lives of the people who leafed through them.

Your Cavendish memories

Nigel Allsopp (Radio Astronomy group 1975-78) recalls working at the Half-Mile Radio Telescope at Lord's Bridge.

News

Photo winners

The winners for the Cavendish Photography Competition 2025 have been announced.

Funding News

Richard Friend's €2.5m ERC grant for the Bright High Spin Molecular Semiconductors (BRIGHTS) project, potentially revolutionising quantum science and optical tech by combining luminescent and spin properties. 

 John Clarke (circled) as a PhD student at the Cavendish Laboratory; (right) Illustration of John Clarke.

News in brief

The latest funding, research, departmental, alumni and awards news, including the 2025 Nobel Prize in physics for Cavendish alumnus John Clarke.

Outreach update

The Cavendish Laboratory’s annual Physics at Work exhibition returned in 2025 with record-breaking attendance and a fresh venue at the Ray Dolby Centre.

How you can contribute

Information about how to support the work of the Department.