Later this decade, the Large Hadron Collider will be upgraded to the High-Luminosity LHC. What does “luminosity” mean in particle physics? Even on the hottest and driest days, rays from the sun are ...

What is luminosity? According to some basic physics, it is just one of the trinities of light's properties. It sits alongside brightness and flux and contributes to warmth. Besides being a lovely ...

Imagine you are standing outside on a clear night, looking up at the sky. When you look at the night sky, some stars appear as faint dots, while others shine so brightly that they light up the ...

Even on the hottest and driest days, rays from the sun are too weak to ignite a fire. But with a magnifying glass (or, in some unfortunate cases, a glass garden ornament), you can focus sunlight into ...