A snapshot of relativistic motion: visualizing the Terrell-Penrose effect
Sign Up to like & getrecommendations! Published in 2025 at "Communications Physics"
DOI: 10.1038/s42005-025-02003-6
Abstract: In 1959, Roger Penrose and James Terrell independently predicted that the Lorentz contraction of fast moving objects is not visible in a snapshot photograph. Rather, the object would appear rotated. This surprising effect has never… read more here.
Keywords: effect; penrose effect; speed light; motion ... See more keywords
An undergraduate laboratory experiment to accurately measure the speed of light.
Sign Up to like & getrecommendations! Published in 2020 at "European Journal of Physics"
DOI: 10.1088/1361-6404/ab923f
Abstract: In 1983 the speed of light was set as an exact quantity. It is now one of the fundamental constants in physics, with the meter being directly related to this speed and the definition of… read more here.
Keywords: experiment accurately; physics; speed; speed light ... See more keywords
Measuring the speed of light with cosmological observations: current constraints and forecasts
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2024/11/062
Abstract: We measure the speed of light with current observations, such as Type Ia Supernova, galaxy ages, radial BAO mode, as well as simulations of forthcoming redshift surveys and gravitational waves as standard sirens. By means… read more here.
Keywords: light cosmological; cosmological observations; measuring speed; cosmology ... See more keywords
Normal DGP in varying speed of light cosmology
Sign Up to like & getrecommendations! Published in 2017 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/17/3/26
Abstract: Varying speed of light (VSL) has been used in cosmological models in which the physical constants vary over time. On the other hand, the Dvali, Gabadadze and Porrati (DGP) brane world model, especially its normal… read more here.
Keywords: cosmology; varying speed; speed light; normal dgp ... See more keywords
Consistency testing for invariance of the speed of light at different redshifts: the newest results from strong lensing and Type Ia supernovae observations
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab1868
Abstract: The invariance of the speed of light in the distant Universe has profound significance for fundamental physics. In this paper, we propose a new model-independent method to test the invariance of the speed of light… read more here.
Keywords: light different; different redshifts; invariance speed; speed light ... See more keywords
Constraining minimally extended varying speed of light by cosmological chronometers
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1190
Abstract: At least one dimensionless physical constant (i.e., a physically observable) must change for the cosmic time to make the varying speed of light (VSL) models phenomenologically feasible. Various physical constants and quantities also should be… read more here.
Keywords: speed light; mevsl; extended varying; varying speed ... See more keywords
SEEC: Photography at the Speed of Light
Sign Up to like & getrecommendations! Published in 2021 at "Leonardo"
DOI: 10.1162/leon_a_01940
Abstract: Abstract SEEC photography is a project at the intersection of art and science. It uses modern technology to record the motion of light, to see c, that is, the universal physical constant for the speed… read more here.
Keywords: seec photography; seec; photography speed; speed light ... See more keywords
At the Speed of Light: Recent Advances on Photocatalyzed Generation and Applications of Iminyl Radicals Promoted by Visible-light
Sign Up to like & getrecommendations! Published in 2024 at "Current Organic Chemistry"
DOI: 10.2174/0113852728301428240517115907
Abstract: Nitrogen-positioned radicals are chemical entities that have a lengthier history than carbon ones and their high reactivity makes them invaluable. But, despite its power, much of its chemistry is still uncharted. Currently, developed methodologies to… read more here.
Keywords: chemistry; advances photocatalyzed; visible light; light recent ... See more keywords