Tag: light
-
Blurring light…
Artificial night-time lighting has a diverse range of effects across the natural world and should be limited where possible, researchers say. (1) Artificial light. But is there natural light? Wasn't the cosmos born in darkness? Didn't all that light come from the shadows? Look again. So clear. So dazzling. Hiding everything because it is so…
-
Faster than light. In nothingness…
It has long been known that charged particles, such as electrons and protons, produce the electromagnetic equivalent of a sonic boom when their speeds exceed that of photons in the surrounding medium. This effect, known as Cherenkov emission, is responsible for the characteristic blue glow from water in a nuclear reactor, and is used to…
-
The third eye… Light… Darkness…
Just like land plants, algae use sunlight as an energy source. Many green algae actively move in the water; they can approach the light or move away from it. For this they use special sensors (photoreceptors) with which they perceive light. The decades-long search for these light sensors led to a first success in 2002:…
-
From electrons to photons. From photons to electrons…
The quantum computer of the future will be able to carry out computations far beyond the capacity of today's computers. Quantum superpositions and entanglement of quantum bits (qubits) make it possible to perform parallel computations. Making useful computations requires large numbers of qubits and it is this upscaling to large numbers that is providing a…
You must be logged in to post a comment.