Christiaan Huygens was born #OnThisDay . He improved the design of telescopes and invented the pendulum clock.🔭😉🕰 In optics, he is best known for his wave theory of light, described in Traité de la Lumière (1690).🌈
IOP Optical Group Optica SPIE IEEE Photonics Society

Robert Alexander Watson-Watt was born #OnThisDay . He was a pioneer of RADAR (RAdio Detection And Ranging): a radio wave system to determine the distance, angle, and radial velocity of objects relative to the site.📡🌈
IOP Optical Group The Optical Society now Optica SPIE IEEE Photonics Society

Igor Tamm was born #OnThisDay in 1895. Physics Nobel 1958, he helped discover Cherenkov radiation - light emitted when a charged particle passes through a medium at a speed > the speed of light in that medium. ⚛️💨🌈🤩
The Optical Society now Optica SPIE IEEE Photonics Society IOP Optical Group

Percy Lavon Julian was born #OnThisDay #OTD in 1899. He was the first to synthesize the natural product physostigmine and was a pioneer in the industrial large-scale chemical synthesis of the human hormones progesterone and testosterone from plant sterols.🧪⚗️👨🏾‍🔬😀👍 Royal Society of Chemistry

Well, it has been >10 years since I last made a poster and… what an engagement at #SPIEPhotonicsEurope !😳 Many thanks to all who came to learn about this emerging research in our team, for all the generous words & reactions!😀 Special thanks to Rachel Won for her interest!👍

First time at #SPIEPhotonicsEurope in Strasbourg and I enjoyed the conference tremendously. Great to meet so many friends, make new ones and learn about exciting discoveries in #photonics ! 🤩👍 Also many thanks for the kind invitation to speak about our latest work.🙂
SPIE

It was a great pleasure to work with the University of Bath social media team on briefly reviewing the #3BodyProblem series. I love the novel and enjoyed the Chinese series version. Looking forward to the next season on Netflix! 😀👍

youtu.be/LZDr6tlOvQU?fe… via YouTube

Electrical engineer Charles Proteus Steinmetz was born #OnThisDay . He made ground-breaking discoveries in the understanding of hysteresis that enabled engineers to design better electromagnetic apparatus equipment. 📺🤩
RAEngGlobal The Optical Society now Optica SPIE IEEE Photonics Society

Engineer Isambard Kingdom Brunel was born #OnThisDay . He is one of the greatest figures of the Industrial Revolution: built dockyards, railways, bridges & tunnels + the first propeller-driven transatlantic steamship.😍👍
RAEngGlobal The Optical Society now Optica SPIE IEEE Photonics Society

Happy 95th birthday to Ivar Giaever!🥳 #OnThisDay He is a Norwegian-American engineer and physicist, Nobel Prize in Physics in 1973 for his 'experimental discoveries regarding tunnelling phenomena in superconductors'. 🙂👍
The Optical Society now Optica SPIE IEEE Photonics Society

Maria Sibylla Merian was born #OnThisDay in 1647. She studied insects and especially moths and butterflies - emblematic of nanophotonics.🦋 She made exquisite illustrations in her work and documented metamorphosis.🤩
Optica SPIE IEEE Photonics Society IOP Optical Group

Yekaterina Romanovna Vorontsova, later Princess Dashkova was born #OnThisDay in 1743. She was president of the Russian Academy of Sciences, the first woman in the world to head a national academy of sciences.🙂👍
The Optical Society now Optica SPIE IEEE Photonics Society The Royal Society

Wilhelm Conrad Röntgen was born #OnThisDay . He was awarded the first Physics Nobel, in 1901, for discovering a new kind of electromagnetic radiation, now known as X-(or Röntgen) rays.☢️🩻🤩 Roentgenium is element 111.
IOP Optical Group Optica SPIE IEEE Photonics Society

Microscopist Giovanni Battista Grassi was born #OnThisDay #OTD in 1854. He identified the types of malarial parasite as well as the mosquito vector. Excellent applications of #photonics !🔬😉
RMS The Optical Society now Optica SPIE IEEE Photonics Society

Josef Stefan was born #OnThisDay . Stefan's law (formulated in 1879), states that the total radiation from a black body is proportional to the fourth power of its thermodynamic temperature.🤩
Optica SPIE IEEE Photonics Society IOP Optical Group

Wernher von Braun was born #OnThisDay #OTD . He was chief architect of the Saturn V rocket that sent humans to the Moon.🤩🚀🌖
Also built V2 rockets that perhaps he didn’t have to build so well.😔

Loooove the new cover of Photonics Focus! 🤩❤️ #photonics
SPIE 👍

Robert Millikan was born #OnThisDay . Physics Nobel 1923, he used the photoelectric effect to accurately measure Planck’s constant & he coined the term 'cosmic rays', after proving their extraterrestrial origin.
☀️⚡️🌍
SPIE Optica IEEE Photonics Society IOP Optical Group

Jean Frédéric Joliot-Curie was born #OnThisDay . He was the husband of Irène Joliot-Curie, with whom he was jointly awarded the Nobel Prize in Chemistry in 1935 for their discovery of artificial radioactivity. ⚛️☢️⚡️😍
SPIE Optica IEEE Photonics Society Royal Society of Chemistry

Rudolf Diesel, inventor of the eponymous engin, was born #OnThisDay #otd . The Diesel engin was cleaner than coal and more fuel-efficient than gasoline engines. At today’s frontier of the nanoscale, motion can be powered by light.☀️
SPIE IEEE Photonics Society The Optical Society now Optica