Isaac Newton, born on January 4, 1643, discovered the laws of motion and other principles that laid the foundation of physics and astronomy. Source: https://earthsky.org/human-world/this-date-in-science-isaac-newtons-birthday…
Tag: mechanics
Physicists Made an Insanely Precise Clock That Keeps Time Using Entanglement
fahrbot-bot quotes an article from Science Alert: Nothing keeps time like the beating heart of an atom. But even the crisp tick-tock of a vibrating nucleus is limited by uncertainties imposed by the laws of quantum mechanics. Several years ago, researchers from MIT and the University of Belgrade in Serbia proposed that quantum entanglement could push clocks beyond this blurry boundary….
When light and atoms share a common vibe
An especially counter-intuitive feature of quantum mechanics is that a single event can exist in a state of superposition—happening both here and there, or both today and tomorrow. …
Physicists quantum simulate a system in which fermions with multiple flavors behave like bosons
In the text book of quantum mechanics, it’s stated that bosons and fermions, two types of elementary particles that build the universe, behave in a drastically different way. For example, bosons can share the same quantum state while fermions of the same kind cannot but fill available quantum states one by one. …
If the multiverse exists, are there infinite copies of me?
According to the many-worlds interpretation of quantum mechanics, the universe is constantly dividing and taking you with it – so would you recognise your other selves if you met them? Source: https://www.newscientist.com/article/mg24833122-100-if-the-multiverse-exists-are-there-infinite-copies-of-me/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Elementary particles part ways with their properties
“Spooky action at a distance,” Einstein’s summation of quantum physics, has been a criticism of quantum mechanics since the field emerged. So far, descriptions of entangled particles to explain their apparently faster-than-light responses, and even explanations for the phase shifts induced by an electromagnetic field in regions where it is zero—the “Aharonov-Bohm” effect—have mostly addressed these concerns. However, recent theoretical and…
Tips on choosing telescopes and binoculars for beginners
Tips for beginners: how to choose binoculars or your first telescope. Source: https://earthsky.org/astronomy-essentials/how-to-choose-1st-telescope-binoculars…
Engineers Are Building Huge Salt Caves To Store Huge Amounts of Hydrogen
An anonymous reader quotes a report from Popular Mechanics: Scientists are going back to the salt mines, literally, to find a revolutionary new way to store large quantities of hydrogen for energy. Proponents say this could be a step toward unlocking hydrogen for renewables — something that could change the energy landscape if it were resolved. “The project would initially have…
Unprecedented accuracy in quantum electrodynamics: Giant leap toward solving proton charge radius puzzle
Physicists at the Max Planck Institute of Quantum Optics have tested quantum mechanics to a completely new level of precision using hydrogen spectroscopy, and in doing so they came much closer to solving the well-known proton charge radius puzzle. …
The Audacious Plan to Launch a Solar-Powered Rocket Into Interstellar Space
Ars Technica glimpsed a possible future at the Johns Hopkins University Applied Physics Laboratory: a solar simulator “that can shine with the intensity of 20 Suns…” “They think it could be the key to interstellar exploration.” “It’s really easy for someone to dismiss the idea and say, ‘On the back of an envelope, it looks great, but if you actually build…