Skip to main content
The science of rainbows inspires new miniature laser technology
Mirrors are the technology behind modern lasers. New research shows that lasers can be made inside water droplets, using the reflective properties of water, write ROX MIDDLETON, LIAM SHAW and JOEL HELLEWELL
A laser display at the Eden Project in Cornwall, 2017

EVERY four years, each Olympic flame starts its life in a parabolic mirror in Greece, lit by reflection of the sun. 

The curved sides of the mirror reflect light to the same point, intensifying the light so brightly that it can cause the torch to catch alight. 

The same phenomenon was responsible when the concave face of a London skyscraper, nicknamed the “Walkie-Talkie,” concentrated the sun’s heat onto a luxury car parked below, melting parts of its metal and glass exterior. 

The 95th Anniversary Appeal
Support the Morning Star
You have reached the free limit.
Subscribe to continue reading.
More from this author
POISON: Centivax workers study antivenom to counteract the bites of various snakes at the company lab in San Francisco
Science and Society / 7 May 2025
7 May 2025

A maverick’s self-inflicted snake bites could unlock breakthrough treatments – but they also reveal deeper tensions between noble scientific curiosity and cold corporate callousness, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT

SCIENCE AND SOCIETY / 22 April 2025
22 April 2025

Science has always been mixed up with money and power, but as a decorative facade for megayachts, it risks leaving reality behind altogether, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT

(Left) Human embryonic stem cells; (right) A patient after i
Features / 26 March 2025
26 March 2025
A small Japanese trial has reported some positive results for stem cell therapy to treat spinal-cord injuries
MORE THAN A WATERWAY: The Agua Clara (Clear Water) locks on
Science and Society / 12 March 2025
12 March 2025
Man-made canals like Panama and Suez face unprecedented challenges from extreme weather patterns and geopolitical tensions that reveal the fragility of our global trade networks, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT
Similar stories
Second Cumming - Bella Caledonia 2020, by Lorna Miller
Exhibition review / 21 March 2025
21 March 2025
In an exhibition of the graphic art of Lorna Miller, MATT KERR takes a lungful of the oxygen of dissent
RESILIENCE: (Right) Stand Up To Racism protest on October 26
Features / 31 December 2024
31 December 2024
The Morning Star sorts the good eggs from the rotten scoundrels of the year
A rainbow lights up the Edinburgh skyline during the Scottis
Science and Society / 4 December 2024
4 December 2024
Rox Middleton, Liam Shaw and Miriam Gauntlett look at the history of lasers, from cat toys to modelling the explosion of stars
World map of submarine communication cables as of July 2015
Science and Society / 14 August 2024
14 August 2024
The infrastructure of the internet relies on submarine optical fibre cables which can be exploited to investigate the oceans and what lies beneath them, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT