The shadow of a Black Hole (2019) and the problematc measurement of light defecton by the sun in 1919

Por Rui Agostinho (FCUL).

The Event Horizon Telescope (EHT) has published in 2019 the first ever image of an Event Horizon, from the very massive central black hole in the M87 galaxy. The team has chosen to publicize it 100 years after the first measurement of light deflection by a strong gravitacional field, which was a landmark for the Theory of Relativity in 1919. This new image did not require a technological revolution and neither did the images taken in 1919, however they all imprint the History of Physics.

Some new perspectives on moments of random matrices

Por Fabio Deelan Cunden (University College Dublin).

Abstract: The study of ‘moments’ of random matrices (expectations of traces of powers of the matrix) is a rich and interesting subject, mainly due to its connections to enumerative geometry. I will give some background on this and then describe some recent work which offers some new perspectives (and new results).

This talk is based on joint works with Antoine Dahlqvist, Francesco Mezzadri, Neil O’Connell and Nick Simm.

AOP 2019 - IV International Conference on Applications in Optics and Photonics

The world of Optics and Photonics meet in Lisbon, Portugal, from the 31th of May to the 4th of June 2019, in the Faculty of Sciences of the University of Lisbon, at the IV International Conference on Applications in Optics and Photonics, AOP 2019.

It will be the major optics conference in Portugal next year and one of the most important at world level, aiming at discuss the recent progress and to establish a view on the future of all fields of optics and photonics.

Seeing is believing

Por Pedro Almeida (Departamento de Física e IBEB - Instituto de Biofísica e Engenharia Biomédica / Ciências ULisboa).

Sumário: Na última metade do século 20, o advento da Tomografia por Emissão de Positrões (PET) e da Ressonância Magnética Nuclear (RMN) revolucionaram a imagem médica in vivo.

A PET tornou-se uma valiosa ferramenta de investigação tendo migrado rapidamente para a clínica, sendo sido seguida pela RMN alguns anos depois.